spiracular


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.
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