plastron

  1. Noun.  The nearly flat part of the shell structure of a tortoise or other animal, similar in composition to the carapace.
  2. Noun.  (fencing) A half-jacket worn under the jacket for padding or for safety.
  3. Noun.  An ornamental front panel on a woman's bodice.
  4. Noun.  A film of air trapped by specialized hairs against the body of an aquatic insect, and which acts as an external gill.

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