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spiracle
spir·a·cle S0645600 (spĭr′ə-kəl, spī′rə-)n.1. Zoology A respiratory aperture, especially:a. Any of several tracheal openings in the exoskeleton of an insect, spider, or other terrestrial arthropod.b. A small respiratory opening behind the eye of most sharks and rays and certain other fishes.c. The blowhole of a cetacean.2. An aperture or opening through which air is admitted and expelled.
[Middle English, from Latin spīrāculum, from spīrāre, to breathe.]
spi·rac′u·lar (spī-răk′yə-lər, spĭ-) adj.spiracle (ˈspaɪərəkəl; ˈspaɪrə-) n1. (Zoology) any of several paired apertures in the cuticle of an insect, by which air enters and leaves the trachea2. (Zoology) a small paired rudimentary gill slit just behind the head in skates, rays, and related fishes3. (Zoology) any similar respiratory aperture, such as the blowhole in whales4. (Geological Science) geology a protrusion of sediment into a lava flow, formed by the explosive transition of water into steam[C14 (originally: breath): from Latin spīrāculum vent, from spīrāre to breathe] spiracular adj spiˈraculate adjspi•ra•cle (ˈspaɪ rə kəl, ˈspɪr ə-)
n. 1. a breathing hole; an opening by which a confined space has communication with the outer air; air hole; blowhole. 2. one of the external orifices of the respiratory system in certain invertebrates. [1300–50; Middle English < Latin spīrāculum air hole =spīrā(re) to breathe + -culum -cle2] spi•rac′u•lar (-ˈræk yə lər) adj. spir·a·cle (spĭr′ə-kəl, spī′rə-kəl) An opening through which certain animals breathe, such as the blowhole of a whale or one of the openings in the exoskeleton of an insect.spiracleA hole through which a creature breathes, such as in the abdomen of an insect.Thesaurus| Noun | 1. |  spiracle - a breathing orifice orifice, porta, opening - an aperture or hole that opens into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"blowhole - the spiracle of a cetacean located far back on the skullstigma - an external tracheal aperture in a terrestrial arthropod |
Translationsspiracle
spiracle1. any of several paired apertures in the cuticle of an insect, by which air enters and leaves the trachea 2. a small paired rudimentary gill slit just behind the head in skates, rays, and related fishes 3. any similar respiratory aperture, such as the blowhole in whales 4. Geology a protrusion of sediment into a lava flow, formed by the explosive transition of water into steam spiracle[′spir·ə·kəl] (invertebrate zoology) An external breathing orifice of the tracheal system in insects and certain arachnids. (vertebrate zoology) The external respiratory orifice in cetaceous and amphibian larvae. The first visceral cleft in fishes. spiracle
spi·ra·cle (spī'ră-kĕl, spir-), An aperture for breathing in arthropods and cetaceans; a similar opening in sharks and related fishes. [L. spiraculum, fr. spiro, to breathe] spiracle (spĭr′ə-kəl, spī′rə-)n.1. Zoology A respiratory aperture, especially:a. Any of several tracheal openings in the exoskeleton of an insect, spider, or other terrestrial arthropod.b. A small respiratory opening behind the eye of most sharks and rays and certain other fishes.c. The blowhole of a cetacean.2. An aperture or opening through which air is admitted and expelled.
spi·rac′u·lar (spī-răk′yə-lər, spĭ-) adj.spiracle - (in fish) a gill-like cleft that opens behind the eye and through which water is drawn in for gaseous exchange (as it is through the mouth) by the expansion of the pharyngeal cavity. It is absent in many bony fish.
- (in arthropods) the exterior opening of the tracheae, often possessing valves that can close to prevent water loss.
spiracle
Words related to spiraclenoun a breathing orificeRelated Words- orifice
- porta
- opening
- blowhole
- stigma
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