Webster’s Revised Unabridged Dictionary · 1913
Impluvium
Im·plu′vi·um (ĭm·plū·vĭ·ŭm), n. [L., fr. impluere to rain into; pref. im- in + pluere to rain.] (Arch.) In Roman dwellings, a cistern or tank, set in the atrium or peristyle to recieve the water from the roof, by means of the compluvium; generally made ornamental with flowers and works of art around its birm.