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

• noncomplying
• noncomprehensive
• noncomprehensively
• nonconcentric
• nonconducting
• nonconductive
• nonconductor
• nonconformance
• nonconforming
• nonconformism
• nonconformist
• nonconformity
• nonconscious
• noncontagious
• noncontentious
• noncontinuous
• noncontributory
• noncontroversial
• nonconvergent
• noncritical
• noncrucial
• noncrystalline
• noncurrent
• noncyclic
• noncyclical