Libation :  n 1: (facetious) a serving of an alcoholic beverage 2: a serving (of wine) poured out in honor of a deity 3: the act of pouring a liquid offering (especially wine) as a religious ceremony

beverage, bumper, burnt offering, collection, draft, dram, drench, drink, drink offering, drop, ex voto offering, gargle, gulp, guzzle, heave offering, hecatomb, holocaust, human sacrifice, immolation, incense, infanticide, jigger, jolt, lap, mactation, nip, oblation, offering, offertory, peace offering, peg, piacular offering, portion, potation, potion, pull, quaff, round, round of drinks, sacramental offering, sacrifice, scapegoat, self-immolation, self-sacrifice, shot, sip, slurp, snifter, snort, spot, suck, sup, suttee, sutteeism, swig, swill, thank offering, tot, votive offering, wet, whole offering,

Libation : \Li*ba"tion\ (l[-i]*b[=a]"sh[u^]n), n. [L. libatio, fr. libare to take a little from anything, to taste, to pour out as an offering: cf. F. libation.] The act of pouring a liquid or liquor, usually wine, either on the ground or on a victim in sacrifice, in honor of some deity; also, the wine or liquid thus poured out. --Dryden. A heathen sacrifice or libation to the earth. --Bacon.