|See also simple harmonic motion a periodic motion in which the displacement is symmetrical about a point or a periodic motion that is composed of such motions|
|a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.|
|a stew of meat, vegetables, potatoes, etc.|
A periodic vibration, as of a violin string, in which the motions are symmetrical about a region of equilibrium. Such a vibration may have only one frequency and amplitude or may be a combination of two or more components called harmonics. Also called periodic motion.