apneustic

[ ap-noo-stik, -nyoo- ]
/ æpˈnu stɪk, -ˈnyu- /

adjective Entomology.

having no open spiracles, as the tracheal systems of certain aquatic insect larvae.

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Origin of apneustic

a-6 + Greek pneustikós pertaining to breathing, equivalent to *pneust(os) (verbid of pneîn to breathe) + -ikos -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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British Dictionary definitions for apneustic

apneustic
/ (æpˈnuːstɪk) /

adjective

of or relating to apneusis
(of certain animals) having no specialized organs for respiration
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