1. Before the Christian era; used following dates before the supposed year Christ was born
   - BC, B.C.

Encyclopedia: Before Christ

• round the clock
• round top
• round trip
• round whitefish
• round window
• round-arm
• round-backed
• round-bottom
• round-bottom flask
• round-bottomed
• round-eyed
• round-faced
• round-fruited
• round-headed leek
• round-leaved rein orchid
• round-shouldered
• round-spored gyromitra
• round-table conference
• round-tailed muskrat
• round-the-clock patrol
• round-trip light time
• round-trip ticket
• roundabout
• roundabout way
• rounded