• WordNet 3.6
    • adj unicellular having or consisting of a single cell
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Webster's Revised Unabridged Dictionary
    • a Unicellular Having, or consisting of, but a single cell; as, a unicellular organism.
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Century Dictionary and Cyclopedia
    • unicellular Consisting of a single cell, as some infusorians and some cryptogams; pertaining to or exhibiting only a single cell, as most of the protozoan animals and protophytic plants, and the undeveloped ova of all metazoan animals. Most unicellular structures or organisms are microscopic, but many attain considerable size, preserving their unicellular state notwithstanding the addition of adventitious protoplasmic material, as the eggs of birds or reptiles. See cut under Protococcus. Also monocellular.
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Chambers's Twentieth Century Dictionary
    • adj Unicellular ū-ni-sel′ū-lar having but one cell.
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Webster's Revised Unabridged Dictionary
Uni-, + cellular,


In literature:

They point out that a man is made up of a great multitude of cells, each equivalent to a unicellular organism.
"God The Invisible King" by Herbert George Wells
All the unicellular algae are included under this head.
"Scientific American Supplement, No. 384, May 12, 1883" by Various
The unicellular organism is the unit of life on this earth.
"Psychology and Achievement" by Warren Hilton
According to Mr. Darwin's theory all the species of higher animals have developed from unicellular ancestors.
"The Whence and the Whither of Man" by John Mason Tyler
Nor does old age supervene in the unicellular organisms.
"Disease and Its Causes" by William Thomas Councilman
The members of this order are minute unicellular plants, growing either in water or on the damp surfaces of stones, tree trunks, etc.
"Elements of Structural and Systematic Botany" by Douglas Houghton Campbell
Bacteria may be defined as very minute unicellular organisms of plantlike character.
"Special Report on Diseases of the Horse" by United States Department of Agriculture
Infusoria and other unicellular animals multiply by division.
"The Beauties of Nature" by Sir John Lubbock
Bishop has found a few new unicellular types, but nothing dangerous.
"Competition" by James Causey
It may be added here, that in this order the spore is simple and unicellular.
"Fungi: Their Nature and Uses" by Mordecai Cubitt Cooke
Unicellular life long precedes multicellular.
"Under the Maples" by John Burroughs
Bacteria may be defined as very minute, unicellular organisms of a plantlike character.
"Special Report on Diseases of Cattle" by U.S. Department of Agriculture
Yes, and as such may be classed the drops of life known as unicellular organisms.
"The Kempton-Wace Letters" by Jack London
If we take the unicellular organisms which multiply by division, we may see that heredity is simple.
"Homo-culture" by Martin Luther Holbrook
There can be no doubt that these cysts represent a stage in the life-history of some minute unicellular plant or animal.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale
Doubling division alone exists, or could exist, among unicellular organisms.
"The Biological Problem of To-day" by Oscar Hertwig
What is in dispute is whether that change remains fixed in the succeeding generations to which these unicellular cells give rise.
"Embryology" by Gerald R. Leighton
In some of the simpler unicellular organisms, e.g.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8" by Various
Thus, a unicellular plant may take on a great complexity of form while still remaining purely unicellular.
"The Contemporary Review, Volume 36, October 1879" by Various
The first grade includes only the Protozoa, or unicellular animals.
"Stories of the Universe: Animal Life" by B. Lindsay

In news:

They are busy identifying which of the lagoon's native species of unicellular micro- algae can be bred in new bioreactors to provide efficient biomass for electricity and motor fuel production.

In science:

On the other hand, eukaryotic unicellular organisms like Dictyostelium discoideum are large enough to sense directly the chemical gradients and respond to them appropriately.
An equation-free computational approach for extracting population-level behavior from individual-based models of biological dispersal
The networks with considerably different functional properties, for example, the neuron networks and transcriptional networks in unicellular organisms, belong to different superfamilies.
On the motifs distribution in random hierarchical networks
CR is a 10µm motile bi-flagellated unicellular alga.
The random walk of a low-Reynolds-number swimmer
Recombination occurs not only during gamete formation in sexually reproducing multicellular organisms but in unicellular organisms such as bacteria and fungi as well .
Nonlinear deterministic equations in biological evolution
In section 7, we will try to understand the role of random evolutionary paths as a possible understanding of the increasing complexity of life, including the unicellular aggregations discussed above.
Randomness and Multi-level Interactions in Biology
This work enumerates the so-called bicoloured unicellular maps with m white and n black vertices and k edges, one of which is marked; this is known to be equivalent to the problem of counting pairs of permutations π , σ ∈ Sk such that c(π) = m, c(σ) = n and πσ is a fixed cycle of length k .
Weak multiplicativity for random quantum channels
An analog of the Harer-Zagier formula for unicellular bicolored maps.
Weak multiplicativity for random quantum channels
An analogue of the Harer-Zagier formula for unicellular maps on general surfaces.
Separation probabilities for products of permutations
Every resolution of a social dilemma marks a major transition in evolutionary history: the formation of chromosomes out of replicating DNA, the transition from unicellular to multicellular organisms or from individuals to societies all require cooperation .
Stochastic evolutionary game dynamics
For example, historically, these characters might be physical characteristics of the organisms (for example, binary characters might include the following: are they unicellular or multicellular, coldblooded or hot-blooded, egg-laying or placental mammals).
Using invariants for phylogenetic tree construction
Interestingly, there is evidence to suggest that even unicellular organisms, such as Saccharomyces cerevisiae, may exhibit immortal DNA strand co-segregation .
Semiconservative quasispecies equations for polysomic genomes: The general case
Therefore, future research will involve using these equations, along with similar equations developed in [10, 18], to model the evolutionary dynamics in asexually replicating unicellular populations.
Semiconservative quasispecies equations for polysomic genomes: The general case