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)

plasˈtral adjective

• steam open
• steam organ
• steam organs
• steam packet
• steam packets
• steam port
• steam ports
• steam power
• steampunk
• steam radio
• steam-roller
• steam-rollered
• steam-rollering
• steam-rollers
• steam room
• steam rooms
• steams
• steamship
• steamships
• steam shovel
• steam shovels
• steamtight
• steam trap
• steam traps
• steam turbine