/ Dictionary / Index S subcosta: Meaning and Definition of Find definitions for: sub•cos•ta Pronunciation: (sub-kos'tu, -kô'stu), [key] — pl. -cos•tae a longitudinal vein in the anterior portion of the wing of an insect. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subcortical subcover 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