/ Dictionary / Index R Ruska: Meaning and Definition of Find definitions for: Rus•ka Pronunciation: (rus'ku Ger. r&oobreves'kä), [key] — n. 1906–88, German physicist and electrical engineer: developed electron microscope; Nobel prize 1986. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rusk Ruskin Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language