/ Dictionary / Index P perlucidus: Meaning and Definition of Find definitions for: per•lu•ci•dus Pronunciation: (pur-l'si-dus), [key] — adj. Meteorol. (of a cloud) having transparent spaces between the elements. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. perlocutionary perm Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language