spiracle

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spir·a·cle

 (spĭr′ə-kəl, spī′rə-)
n.
1. Zoology A respiratory aperture, especially:
a. Any of several tracheal openings in the exoskeleton of an insect, spider, or other terrestrial arthropod.
b. A small respiratory opening behind the eye of most sharks and rays and certain other fishes.
c. The blowhole of a cetacean.
2. An aperture or opening through which air is admitted and expelled.

[Middle English, from Latin spīrāculum, from spīrāre, to breathe.]

spi·rac′u·lar (spī-răk′yə-lər, spĭ-) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

spiracle

(ˈspaɪərəkəl; ˈspaɪrə-)
n
1. (Zoology) any of several paired apertures in the cuticle of an insect, by which air enters and leaves the trachea
2. (Zoology) a small paired rudimentary gill slit just behind the head in skates, rays, and related fishes
3. (Zoology) any similar respiratory aperture, such as the blowhole in whales
4. (Geological Science) geology a protrusion of sediment into a lava flow, formed by the explosive transition of water into steam
[C14 (originally: breath): from Latin spīrāculum vent, from spīrāre to breathe]
spiracular adj
spiˈraculate adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

spi•ra•cle

(ˈspaɪ rə kəl, ˈspɪr ə-)

n.
1. a breathing hole; an opening by which a confined space has communication with the outer air; air hole; blowhole.
2. one of the external orifices of the respiratory system in certain invertebrates.
[1300–50; Middle English < Latin spīrāculum air hole =spīrā(re) to breathe + -culum -cle2]
spi•rac′u•lar (-ˈræk yə lər) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

spir·a·cle

(spĭr′ə-kəl, spī′rə-kəl)
An opening through which certain animals breathe, such as the blowhole of a whale or one of the openings in the exoskeleton of an insect.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

spiracle

A hole through which a creature breathes, such as in the abdomen of an insect.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.spiracle - a breathing orificespiracle - a breathing orifice      
orifice, porta, opening - an aperture or hole that opens into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"
blowhole - the spiracle of a cetacean located far back on the skull
stigma - an external tracheal aperture in a terrestrial arthropod
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
spiracle

spiracle

[ˈspɪrəkl] Nespiráculo m
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

spiracle

n (of shark, ray etc)Atemloch nt; (of insect also)Stigma nt (spec); (of whale, dolphin)Spritzloch nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007