Definition of photoisomerize in US English:
photoisomerize
(also photoisomerise)
verb
Chemistry
no object To undergo photoisomerization. Also with object: to cause to undergo photoisomerization.
Origin
1960s; earliest use found in Journal of the American Chemical Society. From photo- + isomerize, after photoisomerization.
Pronunciation
photoisomerize
/ˌfəʊtəʊˈʌɪsəmərʌɪz/