genus

Definitions

  • WordNet 3.6
    • n genus a general kind of something "ignore the genus communism"
    • n genus (biology) taxonomic group containing one or more species
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The only animals that are capable of turning their heads 180 degrees are from the genus Galago, such as the Tarsier
    • Genus (Logic) A class of objects divided into several subordinate species; a class more extensive than a species; a precisely defined and exactly divided class; one of the five predicable conceptions, or sorts of terms.
    • Genus (Biol) An assemblage of species, having so many fundamental points of structure in common, that in the judgment of competent scientists, they may receive a common substantive name. A genus is not necessarily the lowest definable group of species, for it may often be divided into several subgenera. In proportion as its definition is exact, it is natural genus; if its definition can not be made clear, it is more or less an artificial genus.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: The Genus and species of a gorilla are Gorilla gorilla.
    • n genus A kind; a sort; a class. Technically— In logic, that which can be predicated of things differing in species; a class having other classes under it.
    • n genus In zoology and botany, a classificatory group ranking next above the species, containing a group of species (sometimes a single species) possessing certain structural characters different from those of any others. The value assigned to a genus is wholly arbitrary—that is, it is entirely a matter of opinion or current usage what characters shall be considered generic and thus constitute a genus; and genera are constantly modified and shifted by specialists, the tendency being mostly to restriction of genera, with the consequent multiplication of their number, and the coinage of new generic names. A genus has no natural, much less necessary, definition, its meaning being at best a matter of expert opinion; and the same is true of the species, family, order, class, etc. A genus of the animal kingdom in the time of Linnæus and other early naturalists was a group of species approximately equivalent to a modern family, sometimes even to an order. Probably upward of 100,000 generic names of as many supposed genera have been coined or used in zoölogy; those in current use at present are estimated at about 60,000, or an average of about (rather more than) one genus for every five species in the animal kingdom. In botany the genera are less restricted and average a much larger number of species, the 9,000 phanerogamic genera, for example, including 100,000 species. The tenable name of any genus is that which has priority of publication, if it has been properly published and characterized, and is not the same as the prior name of some other genus. The names of the genus and the species together form the scientific name of an animal or a plant. In writing the technical name of any animal or plant, the generic term always precedes the specific, and begins with a capital letter: as, Musca domestica, the house-fly, where Musca is the genus, and domestica differentiates the species. Genera are often subdivided into lesser groups called subgenera. (See subgenus.) A group of genera constitutes a family or subfamily. The name of a genus as such has properly no plural. If a genus name, as for example Ada, is pluralized, as Adœ, it means, not two or more genera named Ada, but either all the species of Ada, or some supergeneric group of which Ada is the type. The former usage is loose, or somewhat cant; the latter is frequent and regular in zoölogy. A genus name is always supposed to be Latin (though its derivation is in the great majority of cases from the Greek), and its plural, if used, is in Latin form; but when it is also Anglicized an English plural is used: as, the chinchillas, the animals of the genus Chinchilla.
    • n genus In old music, a formula or method of dividing the tetrachord. Three genera were distinguished: the diatonic, in which whole steps or “tones” were used; the chromatic, in which only half-steps or semitones were used; and the enharmonic, in which intervals less than a half-step were used.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: Today's commercial bananas are scientifically classified into the genus Musa of the Musaceae family.
    • n Genus jē′nus (zool.) a group consisting of a number of species closely connected by common characters or natural affinity:
    • n Genus jē′nus (log.) a class of objects comprehending several subordinate species
    • ***

Quotations

  • Charlotte P. Gillman
    Charlotte P. Gillman
    “The female of the genus homo is economically dependent on the male. He is her food supply.”

Etymology

Webster's Revised Unabridged Dictionary
L., birth, race, kind, sort; akin to Gr. . See Gender, and cf. Benign
Chambers's Twentieth Century Dictionary
L. genus, generis, birth; cog. with Gr. genosgignesthai.

Usage

In literature:

Of this genus there are several well-known species.
"The Boy Hunters" by Captain Mayne Reid
They told me the right genus, but couldn't tell me the species.
"Northern Nut Growers Association Report of the Proceedings at the Forty-Second Annual Meeting" by Northern Nut Growers Association
This might be made a genus, corresponding to Hypoxylon as to stroma, but having the stroma hollow and filled with a pulverulent mass.
"Synopsis of Some Genera of the Large Pyrenomycetes" by C. G. Lloyd
It would be necessary only to know the genus and perhaps the race or variety, to know the individual.
"Harvard Classics Volume 28" by Various
This, while they claim a sort of miniature relationship, forms them into a separate genus.
"Anecdotes of the Habits and Instinct of Animals" by R. Lee
The Big Trees and redwoods are the last surviving species of a genus which was once widely distributed over the earth.
"The Western United States" by Harold Wellman Fairbanks
There is one genus of South American Longicorns that appears to mimic the shielded bugs of the genus Scutellera.
"Contributions to the Theory of Natural Selection" by Alfred Russel Wallace
To define any species, the genus having been defined, the genus should be named and the difference added.
"The Classification of Patents" by United States Patent Office
So on my theory, it must have been with species of the same genus.
"The Foundations of the Origin of Species" by Charles Darwin
Let (A) be a common, widely-diffused, and varying species, belonging to a genus large in its own country.
"On the Origin of Species by Means of Natural Selection" by Charles Darwin
Here is another genus of snakes that is found commonly in many sections of our country.
"Pathfinder" by Alan Douglas
These swans, like others of the genus, do not care much for the salt water.
"The Young Voyageurs" by Mayne Reid
One genus, called the Seed-eaters, is a very curious kind.
"Quadrupeds, What They Are and Where Found" by Mayne Reid
But in the genus Isachne both the flowers are perfect.
"A Handbook of Some South Indian Grasses" by Rai Bahadur K. Ranga Achariyar
Or, to take a case where only the species of a single genus are concerned.
"Darwin, and After Darwin (Vol. 1 and 3, of 3)" by George John Romanes
A genus of climbing shrubs.
"Golden Days for Boys and Girls" by Various
This is remarkable, as Gervais gives {121} seven as the number for the whole genus Lepus.
"The Variation of Animals and Plants Under Domestication, Vol. I." by Charles Darwin
North American jumping mice (Genus Zapus).
"Mammals of Mesa Verde National Park, Colorado" by Sydney Anderson
The peduncle in this genus attains its greatest development.
"A Monograph on the Sub-class Cirripedia (Volume 1 of 2)" by Charles Darwin
The technical names for higher and lower classes are GENUS and SPECIES.
"Logic, Inductive and Deductive" by William Minto
***

In news:

Jazz bassist James Genus on SNL, influences and languages of music.
Genus Oncology, LLC Announces Orphan Drug Status for GO-203-2c for Treatment of Pancreatic Cancer.
The human race , all alone in our genus.
Our much-maligned mega-mall represents a highly evolved, if slightly mutated, specimen of a genus that sprung into being more than 80 years ago.
Vladimir Nabokov described the Icaricia genus in 1944.
Its genus, as Philip Lopate describes it, is the personal essay: the essay that talks to everyone, about all of us, from firsthand experience.
It's the sole species in its genus, family and order.
In this clip from La Danse: Le Ballet de l'Opera de Paris, watch a rehearsal of Genus by Wayne McGregor.
The 12-million-year-old skull belonged to a now-extinct genus and species of sperm whale .
The 12-million-year-old skull belonged to a now-extinct genus and species of sperm whale.
Over a six-year period, a bacterium from the genus Rickettsia swept through the whitefly population, assuring survival advantages for the whiteflies and for itself.
Stately pumpkins, lumpy decorative gourds and tasty squash are all closely related members of this genus.
Sci-News reports a new genus of spider was discovered near Israel.
Leaf miner moths The three newly identified moths are part of the Urodeta genus, a group of moths that has not been very well-studied.
Paper wasps Paper Wasp (Genus Polistes).
***

In science:

The Mumford-Tate group of the Prym variety of a general ´etale cover of a curve of genus g ≥ 2 contains a conjugate of the Mumford-Tate group of any curve of genus g − 1. 3.
The Hodge Conjecture for general Prym varieties
The genus zero and two contributions to the 22R4 term in the ten-dimensional S-matrix, for example, indicates that separately every term proportional to 22 at g > 2 has to be zero (every perturbative term at different genus differs by powers of τ 2 2 ).
On the finiteness of N=8 quantum supergravity
S C (Γn , O)) = genus(S O (Γn , O)) = 1 + To estimate the genus of a random surface we need to estimate the number of faces (or left-hand paths of the oriented graph).
On the Genus of a Random Riemann Surface
If b denotes the genus of the base B and g the genus of a fibre, the irregularity of a fibred surface is sub ject to b ≤ q ≤ g + b.
Maximally irregularly fibred surfaces of general type
For a fibred surface f : X → B we denote b = g (B ) the base genus and g = g (F ) the fibre genus.
Maximally irregularly fibred surfaces of general type
The only singular fibres of surfaces in Sm.i. 3,b are curves of genus 2 with one node or a smooth curve of genus 2 together with a smooth P1 , which have two transversal intersections.
Maximally irregularly fibred surfaces of general type
We call this the fibre genus condition (F GC ) and base genus condition (BGC ) respectively, and we restrict ourselves from now on to such surfaces.
Maximally irregularly fibred surfaces of general type
In particular, genus 1 targets lead to the where g (X ) is the genus of X . uniform measure on partitions.
The uses of random partitions
This is a practical method for curves of small genus, but has limitations as the genus increases, due to the fact that such invariants are not known for large genus.
Determining the automorphism group of a hyperelliptic curve
Here, a map of genus g is an oriented connected graph drawn on a surface of genus g modulo equivalent classes.
Large deviations and stochastic calculus for large random matrices
We will look at 3-manifolds of a fix ed Heegaard genus g, and consider gluings obtained by a random word in a finite set of generators for the mapping class group of the surface of genus g.
Finite covers of random 3-manifolds
With a slightly different model, that of gluing sides of an ngon, the genus distribution is needed to compute the Euler characteristic of the moduli space of Riemann surfaces of a fixed genus.
Finite covers of random 3-manifolds
Note that this says that the expected genus is about n/4 − log(n) where the maximum genus possible with n triangles is ⌊n/4⌋.
Finite covers of random 3-manifolds
Proof Cutting a positive-genus surface along a separating loop produces two surfaces (with boundary), each with strictly positive genus.
Heegaard splittings and the pants complex
For each g greater then or equal to the genus of Σ , let Σg be a stabilization of Σ such that Σg has genus g .
Heegaard splittings and the pants complex
***