(ˈ)sü|tän noun
( -s )
Etymology: French, alteration (influenced by sous ) (I) of Middle French sottane, from Old Italian sottana, feminine of sottano, from Medieval Latin subtanus, adjective, lower, under, from Latin subtus below, under + -anus -an; from its being worn under the vestments at religious services — more at sous
: a cassock worn by secular clergy of the Roman Catholic Church