adaptation

Some people always read the book before seeing the movie adaptation of it: They want to get the real story before it's rewritten for film and imagine what all the characters look like before the wrong actors are chosen to play them.

Charles Darwin first used adaptation in 1859 to describe how an organism adapts and changes to become better suited to living in its habitat. Since then, the noun adaptation is often used to describe a change in behavior in response to new or modified surroundings, from learning to outrun a predator to wearing earplugs to block out your noisy neighbors. Or even changing that novel a bit to fit the demands of the big screen.

Primary Meanings of adaptation

1.
n
the process of adapting to something (such as environmental conditions)
2.
n
a written work (as a novel) that has been recast in a new form
Full Definitions of adaptation
1

n the process of adapting to something (such as environmental conditions)

Synonyms:
adaption, adjustment
Types:
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acclimation, acclimatisation, acclimatization
adaptation to a new climate (a new temperature or altitude or environment)
dedifferentiation
the loss of specialization in form or function
domestication
adaptation to intimate association with human beings
differentiation, specialisation, specialization
(biology) the structural adaptation of some body part for a particular function
Type of:
biological process, organic process
a process occurring in living organisms

n (physiology) the responsive adjustment of a sense organ (as the eye) to varying conditions (as of light)

Types:
dark adaptation
the process of adjusting the eyes to low levels of illumination; cones adapt first; rods continue to adapt for up to four hours
light adaptation
the process of adjusting the eyes to relatively high levels of illumination; the pupil constricts and the cones system is operative
Type of:
adjustment, alteration, modification
the act of making something different (as e.g. the size of a garment)
2

n a written work (as a novel) that has been recast in a new form

“the play is an adaptation of a short novel”
Synonyms:
version
Types:
modernization
a modernized version (as of a play)
versification
a metrical adaptation of something (e.g., of a prose text)
Type of:
piece of writing, writing, written material
the work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect)