/ Dictionary / Index S semitropical: Meaning and Definition of Find definitions for: sem•i•trop•i•cal Pronunciation: (sem"ē-trop'i-kul, sem"ī-), [key] — adj. subtropical. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: semitropical (Thesaurus) semitransparent semitruck Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language