| Noun | 1. | plastron - the ornamental front of a woman's bodice or shirt bodice - part of a dress above the waist shirtfront - the front of a shirt (usually the part not covered by a jacket); "he had spilled catsup on his shirtfront" |
| 2. | plastron - the front of man's dress shirt dress shirt, evening shirt - a man's white shirt (with a starch front) for evening wear (usually with a tuxedo) shirtfront - the front of a shirt (usually the part not covered by a jacket); "he had spilled catsup on his shirtfront" | |
| 3. | plastron - a metal breastplate that was worn under a coat of mail | |
| 4. | plastron - a large pad worn by a fencer to protect the chest pad - a flat mass of soft material used for protection, stuffing, or comfort | |
| 5. | plastron - (zoology) the part of a turtle's shell forming its underside turtle - any of various aquatic and land reptiles having a bony shell and flipper-like limbs for swimming exoskeleton - the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs zoological science, zoology - the branch of biology that studies animals |