R.C.Ch. a basin with a drain, formerly near the altar, now usually in the sacristy, for the disposal of holy water, waste water from washing altar linen, etc.
Origin of piscinaL, tank, cistern, origin, originally , fishpond from piscis, fish
nounpl. pi·sci·nae, Ecclesiastical
A stone basin with a drain for carrying away the water used in ceremonial ablutions.
Origin of piscinaMiddle English piscine from Medieval Latin piscīna from Latin fishpond, pool from piscis fish
From the Medieval Latin, from Latin piscÄ«na (“fishpond; swimming pool"), from piscis (“fish"). (1793)