/ Dictionary / Index S subatmospheric: Meaning and Definition of Find definitions for: sub•at•mos•pher•ic Pronunciation: (sub"at-mus-fer'ik, -fēr'-), [key] — adj. (of a quantity) having a value lower than that of the atmosphere: subatmospheric temperatures. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subastringent subatom 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