Ĭd′/i-o-sĭn′cra-sy, n.

n. [Fr. idiosyncrasie and idiosyncrase, It. & Sp. idiosincrasia, Gr. ἰδιοσυγκρασία, from ἴδιος, proper, peculiar, and σύγκρασις, a mixing together, from συγκραννύναι, to mix together, from σύν, with, and κεραννύναι, to mix.] A peculiarity of constitution and susceptibility; characteristic belonging to, and distinguishing, an individual; idiocrasy.

The individual mind ... takes its tone from the idiosyncrasies of the body. I. Taylor.