Breadcrumb Home > Dictionary > Index C course protractor: Meaning and Definition of Find definitions for: course' protrac"tor Pronunciation: [key] a navigational instrument for measuring the bearing of a course as given on a chart, having a disk calibrated in degrees and an arm pivoted about the center of the disk. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. course courser TrendingHere are the facts and trivia that people are buzzing about. Who's Who in the "Lord of the Rings" Roman Catholic Church Hierarchy Current Events This Week: March 2023 42 Top Western Movie Quotes Slaves in the Family User's Guide to Environmental Language ✖ Related Content Daily Word Quiz: felicitous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language