plural of orthosis

(rare) Relating to or having the orthodox form of sexuality in a particular culture.

(rare) The orthodox or socially accepted form of sexuality or sexual expression in a particular culture.

(mineralogy) An orthorhombic-pyramidal pale blue green mineral containing calcium, copper, hydrogen, oxygen, sulfur, and zinc.

(biology, historical) The hypothesis that posits that orthogenesis works by means of natural selection. / (genetics) The acquisition of a common series of rearrangements within a genetic lineage.

(organic chemistry) regioselective of the ortho- position in a benzene ring