SPIRACLES

Noun

spiracles

plural of spiracle

Source: Wiktionary


SPIRACLE

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



RESET




Word of the Day

8 November 2024

REPLACEMENT

(noun) the act of furnishing an equivalent person or thing in the place of another; “replacing the star will not be easy”


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