Wiktionary
methasone
n. (context medicine English) Any of a group of closely-related corticosteroids used as an anti-inflammatory
Wikipedia
Methasone
The methasones (or metasones) are a class of corticosteroids generally used in dermatology.
Examples include alclometasone, amelometasone, beclometasone, betamethasone, cormetasone, desoximetasone, dexamethasone, flumetasone, halometasone, icometasone, mometasone, and paramethasone.