variation

an instance of change; the rate or magnitude of change

an activity that varies from a norm or standard; "any variation in his routine was immediately reported"

a repetition of a musical theme in which it is modified or embellished

something a little different from others of the same type; "an experimental version of the night fighter"; "a variant of the same word"; "an emery wheel is the modern variation of a grindstone"; "the boy is a younger edition of his father"

an artifact that deviates from a norm or standard; "he patented a variation on the sandal"

the angle (at a particular location) between magnetic north and true north

the process of varying or being varied

(astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon)

(biology) an organism that has characteristics resulting from chromosomal alteration

(ballet) a solo dance or dance figure

the act of changing or altering something slightly but noticeably from the norm or standard; "who is responsible for these variations in taxation?"