- 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
The researchers found that when Tiktaalik slid its palate around, its own spiracles would have expanded, perhaps enhancing its ability to breathe air.This ancient fish-crocodile mashup snared its prey using a key adaptation|Kate Baggaley|February 3, 2021|Popular Science
Small capitate processes or organs, observable under the wings of Diptera, attended by a spiracle.An Introduction to Entomology: Vol. III (of 4)|William Kirby
The first cleft is no longer similar to the rest, but has commenced to be metamorphosed into the spiracle.
The external gills project from all the gill-slits including the spiracle.
But the first has already atrophied considerably, and may easily be recognized as the spiracle.
Spiracle, spir′a-kl, n. a breathing-hole: any minute passage.