/ Dictionary / Index P patent log: Meaning and Definition of Find definitions for: pat'ent log' Pronunciation: [key] — Naut. Naut. any of various devices for determining the speed of a ship by means of a vaned rotor streamed at the end of a log line upon which it exerts a torsion transmitted to a registering device on board. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. patent leather patent medicine Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language