/plas"treuhn/ , n.
1. a piece of plate armor for the upper part of the torso in front.
2. Fencing. a quilted pad worn over part of the torso, for protection.
3. an ornamental front piece of a woman's bodice.
4. the starched front of a shirt.
5. Zool. the ventral part of the shell of a turtle.
[ 1500-10; piastrone, aug. of piastra metal plate, PIASTER. See PLASTER ]