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.}}

Noun

(homeostases)

(physiology) The ability of a system or living organism to adjust its internal environment to maintain a state of dynamic constancy; such as the ability of warm-blooded animals to maintain a stable temperature.

* 2011 , Professional Guide to Pathophysiology , Lippincott, Williams, & Wilkins, page 1:

When homeostasis is disrupted by an external stressor - such as injury, lack of nutrients, or invasion by parasites or other organisms - illness may occur.

Such a dynamic equilibrium or balance.