chiral

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1. (of a molecule) not superimposable on its mirror image.

adj.

1894, a hybrid coined by Lord Kelvin from Latinized comb. form of Greek kheir “hand” (from PIE *ghes- “hand;” see chiro-) + -al (1).

adj.

1. Of or relating to the structural characteristic of a molecule that makes it impossible to superimpose it on its mirror image.

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