Definition for SPIR'A-CLE

SPIR'A-CLE, n. [L. spiraculum, from spiro, to breathe.]

  1. A small aperture in animal and vegetable bodies, by which air or other fluid is exhaled or inhaled; a small hole, orifice or vent; a pore; a minute passage; as, the spiracle of the human skin.
  2. Any small aperture, hole or vent. – Woodward.

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