English definition of Spiracle

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Definition of spiracle

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Spiracle (n.) A tubular orifice communicating with the gill cavity of certain ganoid and all elasmobranch fishes. It is the modified first gill cleft.

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Eristalis :: Eristalis (n.) A genus of dipterous insects whose young (called rat-tailed larvae) are remarkable for their long tapering tail, which spiracles at the tip, and for their ability to live in very impure and salt waters; -- also called drone fly..

Spiracle :: Spiracle (n.) The nostril, or one of the nostrils, of whales, porpoises, and allied animals..

Blowhole :: Blowhole (n.) A nostril or spiracle in the top of the head of a whale or other cetacean.

Spiraea :: Spiracular (a.) Of or pertaining to a spiracle.

Peritreme :: Peritreme (n.) That part of the integument of an insect which surrounds the spiracles.

Stigma :: Stigma (v. t.) One of the external openings of the tracheae of insects, myriapods, and other arthropods; a spiracle..

Insecta :: Insecta (n. pl.) One of the classes of Arthropoda, including those that have one pair of antennae, three pairs of mouth organs, and breathe air by means of tracheae, opening by spiracles along the sides of the body. In this sense it includes the Hexapoda, or six-legged insects and the Myriapoda, with numerous legs. See Insect, n..

Spiracular :: Spiracle (n.) Any small aperture or vent for air or other fluid.

Spiracle :: Spiracle (n.) One of the external openings communicating with the air tubes or tracheae 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..

Spiracle :: Spiracle (n.) A tubular orifice communicating with the gill cavity of certain ganoid and all elasmobranch fishes. It is the modified first gill cleft.

Porous :: Porous (n.) Full of pores; having interstices in the skin or in the substance of the body; having spiracles or passages for fluids; permeable by liquids; as, a porous skin; porous wood..