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  1. Oxford Dictionary

    spiracle

    • IPA[ˈspʌɪrək(ə)l]

    英式

    • n.
      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.

    • noun: spiracle, plural noun: spiracles