(Zoology)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 (动)喷水孔,(节肢动物的)气门,气孔;(软骨鱼的)腮孔
派生 spiracular adjective 语源
late 18th cent.: from Latin spiraculum, from spirare 'breathe'