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gill slit

[gil] /gɪl/
noun
Origin
1850-1855
1850-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for gill-slit

gill slit

/ɡɪl/
noun
1.
any of a series of paired linear openings to the exterior from the sides of the pharynx in fishes and some amphibians. They contain the gills
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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gill-slit in Medicine

gill slit n.
One of several rudimentary invaginations in the embryonic surface, present during development of air-breathing vertebrates and corresponding to the functional gill slits of aquatic species.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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gill-slit in Science
gill slit  
In primitive chordates and cartilaginous fish, such as sharks, one of several narrow external openings connecting with the pharynx through which water passes to the exterior, thereby bathing the gills. Bony fish and all other vertebrates, including humans, have rudimentary gill slits during their embryonic stage.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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