metachrosis
noun
meta·chro·sis
ˌmet-ə-ˈkrō-səs 
plural metachroses
-ˌsēz
: the power of some animals (as many fishes and reptiles) to change color voluntarily by the expansion of special pigment cells
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“Metachrosis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/metachrosis. Accessed 25 Dec. 2024.
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