| 单词 | spiracle |
| 释义 | Word Frequency spiracle(ˈspaɪərəkəl, ˈspaɪrə-) noun 1. 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 Derived forms spiracular (spɪˈrækjʊlə) adjective spiraculate (spiˈraculate) adjective Word origin C14 (originally: breath): from Latin spīrāculum vent, from spīrāre to breathe |
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