necessarium

Etymology
From, from +.

Noun

 * : a monastery's latrine, outhouse, or lavatory, typically located behind the dormitory.
 * 1) * 1878, "Abbey" in Encyclopædia Britannica, 9th ed., Vol. I, p. 13:
 * A passage at the other end [of the dormitory from the passage to the south transept of St Gall's church leads to the “necessarium” (I), a portion of the monastic buildings always planned with extreme care.
 * 1)  A lavatory.
 * 1)  A lavatory.

Synonyms

 * See Thesaurus:bathroom

Derived terms

 * , the

Noun

 * 1) A reredorter: a monastery's latrine, outhouse, or lavatory.
 * 2) Any outhouse.