plastron

plastron is defined in Webster's Unabridged Dictionary (1913) with 3 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.(Anc. Armor) An iron breastplate, worn under the hauberk.
  2. 2.(Anat.) The ventral shield or shell of tortoises and turtles. See Testudinata.
  3. 3.A trimming for the front of a woman's dress, made of a different material, and narrowing from the shoulders to the waist.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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