SPIRACLE
spiracle
(noun) a breathing orifice
Source: WordNet® 3.1
Etymology
Noun
spiracle (plural spiracles)
A pore or opening used (especially by arthropods and some fish) for respiration.
The blowhole of a whale, dolphin or other similar species.
Any small aperture or vent for air or other fluid.
Anagrams
• calipers, earclips, replicas
Source: Wiktionary
Spir"a*cle, n.Etym: [L. spiraculum, fr. spirare to breathe: cf. F.
spiracule. See Spirit.]
1. (Anat.)
Definition: The nostril, or one of the nostrils, of whales, porpoises, and
allied animals.
2. (Zoöl.)
(a) One of the external openings communicating with the air tubes or
tracheæ of insects, myriapods, and arachnids. They are variable in
number, and are usually situated on the sides of the thorax and
abdomen, a pair to a segment. These openings are usually elliptical,
and capable of being closed. See Illust. under Coleoptera.
(a) A tubular orifice communicating with the gill cavity of certain
ganoid and all elasmobranch fishes. It is the modified first gill
cleft.
3. Any small aperture or vent for air or other fluid.
Source: Webster’s Unabridged Dictionary 1913 Edition