1. (of bone especially the temporal bone) resembling stone in hardness
   - petrous

See also: hard

• top of the inning
• top of the line
• top off
• top onion
• top out
• top quark
• top round
• top up
• top-down
• top-drawer
• top-flight
• top-grade
• top-heavy
• top-hole
• top-level
• top-post
• top-quality
• top-secret
• topaz
• topcoat
• topdress
• tope
• topee
• Topeka
• toper