isthmoid

isthmus

[is-muhs]
noun, plural isthmuses, isthmi [is-mahy] .
1.
a narrow strip of land, bordered on both sides by water, connecting two larger bodies of land.
2.
Anatomy, Zoology. a connecting, usually narrow, part, organ, or passage, especially when joining structures or cavities larger than itself.
3.
Ichthyology. the narrow fleshy area between the sides of the lower jaw of a fish.

Origin:
1545–55; < Latin < Greek isthmós neck (of land)

isthmoid, adjective
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World English Dictionary
isthmus (ˈɪsməs)
 
n , pl -muses, -mi
1.  a narrow strip of land connecting two relatively large land areas
2.  anatomy
 a.  a narrow band of tissue connecting two larger parts of a structure
 b.  a narrow passage connecting two cavities
 
[C16: from Latin, from Greek isthmos]
 
'isthmoid
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

isthmus
1555, from Gk. isthmos "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
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American Heritage
Medical Dictionary

isthmus isth·mus (ĭs'məs)
n. pl. isth·mus·es or isth·mi (-mī')
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.
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American Heritage
Science Dictionary
isthmus   (ĭs'məs)  Pronunciation Key 
Plural isthmuses or isthmi (ĭs'mī')
A narrow strip of land connecting two larger masses of land.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
isthmus [(is-muhs)]

A narrow strip of land that connects two larger bodies of land and has water on both sides.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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