OSCILLATING

oscillatory, oscillating

(adjective) having periodic vibrations

Source: WordNet® 3.1

Adjective

oscillating (not comparable)

Moving in a repeated back-and-forth motion.

Verb

oscillating

present participle of oscillate

Source: Wiktionary

Os"cil*la`ting, a.

Definition: That oscillates; vibrating; swinging. Oscillating engine, a steam engine whose cylinder oscillates on trunnions instead of being permanently fixed in a perpendicular or other direction. Weale.

OSCILLATE

Os"cil*late, v. i. [imp. & p. p. Oscillated; p. pr. & vb. n. Oscillating.] Etym: [L. oscillare to swing, fr. oscillum a swing, a little mask or puppet made to be hung from trees and swing in the wind, prob. orig., a little mouth, a dim. from os mouth. See Oral, and cf. Osculate.]

1. To move backward and forward; to vibrate like a pendulum; to swing; to sway.

2. To vary or fluctuate between fixed limits; to act or move in a fickle or fluctuating manner; to change repeatedly, back and forth. The amount of superior families oscillates rather than changes, that is, it fluctuates within fixed limits. Dc Quincey.

Source: Webster’s Unabridged Dictionary 1913 Edition