- an aperture or orifice through which air or water passes in the act of respiration, as the blowhole of a cetacean.
- an opening in the head of sharks and rays through which water is drawn and passed over gills.
- one of the external orifices of the tracheal respiratory system of certain invertebrates, usually on the sides of the body.
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Origin of spiracle
OTHER WORDS FROM spiraclespi·rac·u·lar [spahy-rak-yuh-ler, spi-], /spaɪˈræk yə lər, spɪ-/, adjectivepre·spi·rac·u·lar, adjective
Words nearby spiracle
Example sentences from the Web for spiracle
Spiracle, spir′a-kl, n. a breathing-hole: any minute passage.
He believes that the blast was strong enough to blow a man off the spiracle if he were seated on it.
The lips are usually horizontal, but sometimes they dip so as to make the spiracle appear open.An Introduction to Entomology: Vol. IV (of 4)|William Kirby
In many sharks and in sturgeons the spiracle forms a conspicuous opening just behind the eye.
The external gills have not appeared on the first cleft or spiracle.The Works of Francis Maitland Balfour, Volume IV (of 4)|Francis Maitland Balfour