n. 1. A metal breastplate worn under a coat of mail. 2. A quilted pad worn by fencers to protect the torso and side. 3. A trimming on the front of a bodice. 4. The front of a man's dress shirt. 5. The front panel of the tunic of a uniform, usually of a different color than the rest. 6. Zoology The ventral part of the shell of a turtle or tortoise. [French, from Old French, from Old Italian piastrone, augmentative of piastra, thin metal plate; see PIASTER.] plastral (-trəl) adj. (click for a larger image) plastronunderside of a painted turtle |
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