/ Dictionary / Index P periodic sentence: Meaning and Definition of Find definitions for: pe'ri•od'ic sen'tence Pronunciation: (pēr'ē-od'ik, pēr"-), [key] a sentence that, by leaving the completion of its main clause to the end, produces an effect of suspense, as in Unable to join the others at the dance because of my sprained ankle, I went to a movie. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. periodic motion periodic system Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language