/ Dictionary / Index S sea palm: Meaning and Definition of Find definitions for: sea' palm" Pronunciation: [key] a kelp, Postelsia palmaeformis, of the Pacific coast of North America, that resembles a miniature palm tree. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sea otter sea pen Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language