American Heritage® Dictionary of the English Language, Fourth Edition
- n. A narrow strip of land connecting two larger masses of land.
- n. Anatomy A narrow strip of tissue joining two larger organs or parts of an organ.
- n. Anatomy A narrow passage connecting two larger cavities.
Century Dictionary and Cyclopedia
- n. 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. In botany and zoology, some connecting part or organ, especially when narrow or joining parts larger than itself.
- n. 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. In fishes, the lower part of the septum between the opposing gill-openings. It is supported and stiffened by the urohyal.
- n. A narrow strip of land, bordered on both sides by water, and connecting two larger landmasses.
- n. anatomy Any such narrow part connecting two larger structures.
GNU Webster's 1913
- n. (Geog.) A neck or narrow slip of land by which two continents are connected, or by which a peninsula is united to the mainland
- n. a cord-like tissue connecting two larger parts of an anatomical structure
- n. a relatively narrow strip of land (with water on both sides) connecting two larger land areas
- Via Latin isthmus, from Ancient Greek ἰσθμός (isthmos, "neck"). Cognate to Old Norse eið ("isthmus"). (Wiktionary)
- Latin, from Greek isthmos. (American Heritage® Dictionary of the English Language, Fourth Edition)
“On the other side of the isthmus is a sandy beach facing the open ocean.”
“This isthmus is filled with energy generating windmills taking advantage of the almost constant high velocity winds known to tip over giant trucks and it has everything to do with the ferocious winds created by a break in the mountain barriers between the Gulf of Mexico and the Pacific that occurs only on the isthmus as you will understand if you review your maps and are contemplative.”
“I picked up the book, looked at the attractive cover, and thought, wow, 350 pages of history about the isthmus is more than I want to read.”
“The isthmus is noted for its nearly constant wind generated by the fact that it is between two seas, the Pacific Ocean and the Gulf of Mexico and there is a gap here in the high sierra so the winds blow through that gap to the extent they can actually upend truck carraiges.”
“They had been established to buffer the central isthmus from the periodic shocks and invasions emanating from the Indian country to their east.”
“The Central American isthmus is a region of great contrasts, but also of heartening unison.”
“In post-conflict countries, such as those found in the Latin American isthmus, this is particularly true.”
“Near the tip of the isthmus was a reasonably high hill and growing on the hill were several good-sized trees.”
“Apparently leading across the head of the island from the town toward the isthmus was the "old Greate Road.”
“The isthmus is the highway between the spinal cord and the higher nerve centres.”
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