Mos | Webster's Dictionary of the English Language

mos
mos, mōris, m. [etym. dub.; perh. root ma-, measure; cf.: maturus, matutinus; prop., a measuring or ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
mos
mōs mōris, m 1 MA-, a will, way, habit, manner, fashion, caprice, humor : suos quoique mos, T.: mo...

An Elementary Latin Dictionary