/dek'seuh meth"euh sohn', -zohn'/ , n. Pharm.
a crystalline, water-soluble steroid, C 22 H 29 FO 5 , used in the treatment of certain allergic or inflammatory conditions, as rheumatoid arthritis, bronchial asthma, or dermatosis.
[ 1955-60; perh. DEXA(MYL) + METH(YL) + -a- (of unclear orig.) (CORTI)SONE ]