Stomata vs. Spiracle

Spiraclenoun

A pore or opening used (especially by spiders and some fish) for breathing.

Spiraclenoun

The blowhole of a whale, dolphin or other similar species.

Spiraclenoun

Any small aperture or vent for air or other fluid.

Spiraclenoun

The nostril, or one of the nostrils, of whales, porpoises, and allied animals.

Spiraclenoun

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.

Spiraclenoun

Any small aperture or vent for air or other fluid.

Spiraclenoun

a breathing orifice

Spiraclenoun

an external respiratory opening, especially each of a number of pores on the body of an insect, or each of a pair of vestigial gill slits behind the eye of a cartilaginous fish.