Main Entry: chi·ral Pronunciation: 'kI-r&l Function: adjective : of or relating to a molecule that is nonsuperimposable on its mirror image —chi·ral·i·ty/kI-'ral-&t-E/nounplural-ties
chiral chi·ral (kī'rəl) adj. Of or relating to the structural characteristic of a molecule that makes it impossible to superimpose it on its mirror image.