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

• disarticulate
• disassemble
• disassembly
• disassociate
• disassociation
• disassortative mating
• disaster
• disaster area
• disastrous
• disastrously
• disavow
• disavowable
• disavowal
• disband
• disbandment
• disbar
• disbarment
• disbelief
• disbelieve
• disbeliever
• disbelieving
• disbelievingly
• disbud
• disburden
• disbursal