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Spiracular

   Also found in: Medical, Encyclopedia, Wikipedia 0.02 sec.
spir·a·cle  (spr-kl, spr-)
n.
1. Zoology A respiratory aperture, especially:
a. Any of several tracheal openings in the exoskeleton of an insect or a spider.
b. A small respiratory opening behind the eye of certain fishes, such as sharks, rays, and skates.
c. The blowhole of a cetacean.
2. An aperture or opening through which air is admitted and expelled.
[Middle English, from Latin sprculum, from sprre, to breathe.]
spi·racu·lar (sp-rky-lr, sp-) adj.
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This embryonic structure persists throughout adult life as the spiracular organ in nonteleost fish (Wright, 1885) and the paratympanic organ in a few reptiles (Simonetta, 1953), most birds (Vitali, 1911) and perhaps one bat species (Vitali, 1924).
The chiropteran paratympanic organ by Scott, Michael G. / Transactions of the Missouri Academy of Science
 
 
 
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