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

Derived forms: screw logs

Type of: log

• Jewry
• jezebel
• JFK
• Jharkhand
• JHVH
• JI
• jiao
• jib
• jibber
• jibboom
• jibe
• jicama
• Jidda
• Jiddah
• jiff
• jiffy
• jig
• jigaboo
• jigger
• jiggered
• jiggermast
• jiggery-pokery
• jiggle
• jigsaw
• jigsaw puzzle