Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. That part of the integument of an insect which surrounds the spiracles.
  • n. The edge of the aperture of a univalve shell.

from the GNU version of the Collaborative International Dictionary of English

  • n. That part of the integument of an insect which surrounds the spiracles.
  • n. The edge of the aperture of a univalve shell.

from The Century Dictionary and Cyclopedia

  • n. In entomology, a small circular sclerite, or ring of hard chitinized integument, often surrounding the spiracle or breathing-hole of an insect.
  • n. In conchology, the circumference of the aperture of a univalve; a peristome.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek, meaning "around a hole".

Examples

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