• WordNet 3.6
    • n isthmus a cord-like tissue connecting two larger parts of an anatomical structure
    • n isthmus a relatively narrow strip of land (with water on both sides) connecting two larger land areas
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The Pacific Ocean at the Isthmus of Panama is often 20 feet higher than the Atlantic Ocean.
    • n Isthmus (Geog) A neck or narrow slip of land by which two continents are connected, or by which a peninsula is united to the mainland; as, the Isthmus of Panama; the Isthmus of Suez, etc.
    • ***
Century Dictionary and Cyclopedia
    • n isthmus A narrow strip of land bordered by water and connecting two larger bodies of land, as two continents, a continent and a peninsula, or two parts of an island. The two isthmuses of most importance are that of Suez, connecting Asia and Africa, and that of Panama or Darien, connecting North and South America. The isthmus most famous in ancient times is that of Corinth, called distinctively the Isthmus, separating the Peloponnesian peninsula from the mainland of Greece. A small isthmus is often called a neck.
    • n isthmus In botany and zoology, some connecting part or organ, especially when narrow or joining parts larger than itself.
    • n isthmus The contracted passage from the cavity of the mouth into that of the pharynx. It is bounded above by the pendulous veil of the palate and uvula, at the sides by the pillars of the fauces, and below by the base of the tongue. More fully called isthmus faucium, isthmus of the fauces.
    • n isthmus In fishes, the lower part of the septum between the opposing gill-openings. It is supported and stiffened by the urohyal.
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Chambers's Twentieth Century Dictionary
    • n Isthmus ist′mus a narrow neck of land connecting two larger portions
    • ***


  • Alexander Pope
    “If, presume not to God to scan; The proper study of Mankind is Man. Plac'd on this isthmus of a middle state, a being darkly wise, and rudely great.”
  • Charles Caleb Colton
    “Time; that black and narrow isthmus between two eternities.”


Webster's Revised Unabridged Dictionary
L. isthmus, Gr. 'isqmo`s a neck, a neck of land between two seas, an isthmus, especially the Isthmus of Corinth; prob. from the root of 'ie`nai to go; cf. Icel. eið, isthmus. See Issue
Chambers's Twentieth Century Dictionary
L.,—Gr. isthmos, a passage, an isthmus, allied to ithma, a step, from root of ienai, to go.


In literature:

Diogenes was buried beside the gate lying toward the isthmus.
"Great Men and Famous Women. Vol. 3 of 8" by Various
Just ahead, rising out of the sea, is the Isthmus of Panama.
"Boy Scouts in the Canal Zone" by G. Harvey Ralphson
It will be remembered that it was a two days' march from Fort M'Bassa through the isthmus of woods to the elephant country.
"The Pools of Silence" by H. de Vere Stacpoole
Dramalis had to give up his conquest of the Morea, and fight his way back to the Isthmus of Corinth.
"A History of the Nineteenth Century, Year by Year" by Edwin Emerson
The canal across the Isthmus of Panama saves ships a journey of many thousand miles around South America.
"Conservation Reader" by Harold W. Fairbanks
The isthmus formed by the bend of the river at the Grand Falls, was formerly cleared by the troops stationed at that post.
"First History of New Brunswick" by Peter Fisher
A narrow isthmus and a lofty bridge connect the island with the adjacent continent.
"Journal of a Visit to Constantinople and Some of the Greek Islands in the Spring and Summer of 1833" by John Auldjo
In July, 1858, Farragut returned to the East by the only route then available, the Isthmus of Panama.
"Admiral Farragut" by A. T. Mahan
Government forces reported approaching the Isthmus in vessels.
"The American Empire" by Scott Nearing
Of course it was necessary for our troops to take this mountain, since, until that could be done, to pass the isthmus would be impossible.
"Under the Ensign of the Rising Sun" by Harry Collingwood

In poetry:

See, revolving, the globe;
The ancestor-continents, away, group'd together;
The present and future continents, north and south, with the isthmus
"Starting From Paumanok" by Walt Whitman
Countries, continents, isthmuses, frontiers,
Lakes and mountains, discussions and news,
Children, grown-ups, old folk, adolescents,
Appreciations, reports and reviews.
"God's World" by Boris Pasternak
My desk is not so wide that I might lean
Against the edge and reach out past the shell
Of board and glass, beyond the isthmus in
The endless miles of my scraped out farewell.
"My desk is not so wide that I might lean" by Boris Pasternak
Stately Spanish galleon coming from the Isthmus,
Dipping through the Tropics by the palm-green shores,
With a cargo of diamonds,
Emeralds, amythysts,
Topazes, and cinnamon, and gold moidores.
"Cargoes" by John Masefield

In news:

Isthmus Marketplace is a list of businesses and organizations serving the Madison, Wisconsin metro area.
What remains of ancient Corinth is just south of modern Corinth, at the top of the Peloponnesus -- the large peninsula of southern Greece, separated from the mainland by the Isthmus of Corinth.
One of the most memorable discoveries to emerge from a full afternoon of tasting at the Isthmus Beer & Cheese Fest last weekend was from one of state's newest breweries.
Meet eight unique Madison companies in the Isthmus Independent Business Awards.
Lock by Lock, Across the Isthmus .
Those arising lateral to the isthmus of the external auditory canal can be removed under local anesthesia using a transmeatal approach.
Cartoonist Lynda Barry brought tremendous empathy and a finely tuned sense of interior life to Ernie Pook 's Comeek, the alternative comic that ran in 70 papers nationwide, including Isthmus.
"And," Mr Calderón noted then, "the Isthmus of Tehuantapec is the area of greatest wind energy potential in the world.".
Most of the Madison isthmus isn't affected by alternative -side parking rules until an actual snow emergency is declared.
The Isthmus Flickr group is the primary source for Madison Snaps, which are published here with the permission of individual contributors.
The field of volcanic cones that stretches across the Auckland isthmus from Manurewa to the North Shore provides the city with a unique setting.
And given the electoral isthmus the two men are wrestling on, it doesn't seem like such a wild one.
Isthmus operatives surprised dozens of Madison-area businesses with Madison's Favorites certificates, prize bags and even pop-up parties last week and caught their reactions on camera.
3,039,000), 29,760 sq mi (77,081 sq km), occupying the Isthmus of Panama , which connects Central and South America.
Florida Museum study shows that the Isthmus of Panama was formed by plate tectonics.

In science:

Definition 7.9 An isthmus of a semimatroid C = (S, C , rC ) is an element e ∈ S such that, for al l A ∈ C , A ∪ e ∈ C and rC (A ∪ e) = rC (A) + 1.
Semimatroids and their Tutte polynomials
Lemma 7.11 If e ∈ S is an isthmus of the semimatroid C = (S, C , rC ), then rC−e = rC − 1.
Semimatroids and their Tutte polynomials
If e is an isthmus then it is clear from the definition that rC−e = rC − 1.
Semimatroids and their Tutte polynomials
If e is not an isthmus, there are two cases.
Semimatroids and their Tutte polynomials
Lemma 7.12 If e ∈ S is a loop or an isthmus of the semimatroid C = (S, C , rC ), then C − e = C /e.
Semimatroids and their Tutte polynomials