stoma

  1. Noun.  (botany) One of the tiny pores in the epidermis of a leaf or stem through which gases and water vapor pass.
  2. Noun.  A small opening in a membrane; a surgically constructed opening, especially one in the abdominal wall that permits the passage of waste after a colostomy or ileostomy.
  3. Noun.  (zoology) A mouthlike opening, such as the oral cavity of a nematode.
  4. Noun.  An artificial anus.

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This entry was last updated on RefTopia from its source on 3/20/2012.