plastron /plasˈtron/

1. A fencer's wadded breast-shield
2. The ventral section of the shell of a tortoise or turtle, or other animal
3. The front of a dress shirt
4. A separate ornamental front part of a woman's bodice
5. A steel breastplate worn under the hauberk (historical)

• ad val.
• ad valorem
• advance
• advanced
• advanced gas-cooled reactor
• advanced guard
• Advanced Higher
• advance directive
• advance directives
• advanced level
• Advanced level
• advanced levels
• advanced passenger train
• advanced skills teacher
• Advanced Subsidiary level
• advance factories
• advance factory
• advance guard
• advance guards
• advance man
• advance men
• advancement
• advancements
• advance note
• advance notes