Noun

(en-noun)

The act of varying; a partial change in the form, position, state, or qualities of a thing

* {{quote-magazine, year=2013, month=May-June, author= David Van Tassel], [http://www.americanscientist.org/authors/detail/lee-dehaan Lee DeHaan

, title= Wild Plants to the Rescue , volume=101, issue=3, magazine=(American Scientist) , passage=Plant breeding is always a numbers game.

A related but distinct thing.

(nautical) The angular difference at the vessel between the direction of true north and magnetic north. Also called magnetic declination.

(board games) A line of play that differs from the original.

(music) A technique where material is repeated with alterations to the melody, harmony, rhythm, timbre, texture, counterpoint or orchestration; but with some invariant characteristic, e.g. a ground bass.

Noun

(label) The quality of being adapted; adaption; adjustment.

(label) Adjustment to extant conditions: as, adjustment of a sense organ to the intensity or quality of stimulation; modification of some thing or its parts that makes it more fit for existence under the conditions of its current environment.

* {{quote-book, title=, year=1911

, passage=ACCLIMATIZATION, the process of adaptation by which animals and plants are gradually rendered capable of surviving and flourishing in countries remote from their original habitats, or under meteorological conditions different from those which they have usually to endure, and at first injurious to them.}}

(label) Something which has been adapted; variation.

* {{quote-book, author=Frederick Lawton, title=, year=1910

, passage=Having partly a bibliographic value, and partly confirming the statements above as to Balzac's influence, the following details concerning theatrical adaptations of some of his novels may serve as a supplement to this chapter.}}