/ Dictionary / Index A arc secant: Meaning and Definition of Find definitions for: arc' se'cant Pronunciation: [key] — Trig. Trig. the angle, measured in radians, that has a secant equal to a given number. Abbr.: arc sec; Symbol: sec&hasp; Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arcsecant (Thesaurus) arc sec arc second Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language