plastron

A metal breastplate worn under a coat of mail.

A quilted pad worn by fencers to protect the torso and side.

A trimming on the front of a bodice.

The front of a man’s dress shirt.

The front panel of the tunic of a uniform, usually of a different color than the rest.

The ventral part of the shell of a turtle or tortoise.

In the Echinodermata, a space surrounded by the subanal fasciole lying beneath the anus, in spatangoid echinoids.

A breastplate; a garment or part of a garment covering the breast. , , ,

In herpetology: The ventral part of the shell of a chelonian or testudinate; the lower shell, or under side of the shell, of a turtle or tortoise: more or less opposed to carapace.

One of the similar exoskeletal plates developed upon the under side of the body of certain Amphibia, as the Labyrinthodonta.