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

• immobilise
• immobiliser
• immobilising
• immobility
• immobilization
• immobilize
• immobilizer
• immobilizing
• immoderate
• immoderately
• immoderateness
• immoderation
• immodest
• immodestly
• immodesty
• immolate
• immolation
• immolator
• immoral
• immorality
• immorally
• immortal
• immortalise
• immortality
• immortalize