/klem"euh steen' fyooh"meuh rayt'/ , Pharm.
an antihistamine, C 25 H 30 ClNO 5 , that has drying and some sedative effects, used for symptomatic relief of allergy.
[ perh. a rearrangement of meclastine an alternate name, perh. ME(THYL) + C(H)L(ORO)- + -astine, alter. and shortening of ANTIHISTAMINE ]