WORD ORIGIN noun, plural isth·mus·es, isth·mi . [ is-mahy] /ˈɪs maɪ/ a narrow strip of land, bordered on both sides by water, connecting two larger bodies of land. . Anatomy, Zoology a connecting, usually narrow, part, organ, or passage, especially when joining structures or cavities larger than itself. . Ichthyology the narrow fleshy area between the sides of the lower jaw of a fish. Origin of isthmus 1545–55; < Latin < Greek isthmós neck (of land) Related forms isth·moid, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for isthmi noun plural -muses or -mi ( -maɪ) a narrow strip of land connecting two relatively large land areas anatomy a narrow band of tissue connecting two larger parts of a structure a narrow passage connecting two cavities Derived Forms isthmoid, adjective Word Origin for isthmus
C16: from Latin, from Greek
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for isthmi n.
1550s, from Latin
isthmus, from Greek isthmos "narrow passage, narrow neck of land," especially that of Corinth, of unknown origin, perhaps from eimi "to go" + suffix -thmo (cf. ithma "a step, movement").
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for isthmi n. pl. isth•mus•es A constriction or narrow passage connecting two larger parts of an organ or other anatomical structure.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for isthmi Plural isthmuses isthmi ( ĭs) ′mī′ A narrow strip of land connecting two larger masses of land.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Culture definitions for isthmi
A narrow strip of land that connects two larger bodies of land and has water on both sides.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.