1. Lying face upward
   - supine

See also: unerect

• Billy Graham
• Billy Mitchell
• Billy Sunday
• Billy Wilder
• billy-ho
• billycan
• billyo
• billyoh
• billystick
• bilobate
• bilobated
• bilobed
• bilocation
• bilocular
• bilocular capsule
• biloculate
• Biloxi
• bilsted
• biltong
• bimanual
• bimbo
• bimester
• bimestrial
• bimetal
• bimetallic