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

• diplomatist
• diplopia
• Diplopoda
• Diplopterygium
• Diplopterygium longissimum
• Diplotaxis
• Diplotaxis erucoides
• Diplotaxis muralis
• Diplotaxis tenuifolia
• diplotene
• Dipnoi
• Dipodidae
• Dipodomys
• Dipodomys ordi
• Dipodomys phillipsii
• Dipogon
• Dipogon lignosus
• dipolar
• dipole
• dipole antenna
• dipole molecule
• dipole moment
• dipped
• Dippel's oil
• dipper