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 pisc&imacron;na, from Latin, fishpond, pool, from piscis, fish.
From the Medieval Latin, from Latin piscÄ«na (“fishpond; swimming pool"), from piscis (“fish"). (1793)