1. A cigar-shaped log with rotary fins that measure the ship's speed
   - patent log, screw log

Derived forms: taffrail logs

Type of: log

• pup tent
• pupa
• pupal
• pupate
• pupet regime
• pupil
• pupillary
• pupillary reflex
• pupillary sphincter
• puppet
• puppet government
• puppet leader
• puppet play
• puppet ruler
• puppet show
• puppet state
• puppeteer
• puppetry
• Puppis
• puppy
• puppy fat
• puppy love
• puppyish
• puppylike
• Purace