- 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.
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
How to use spiracle in a sentence
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.