a ritual vessel used during ceremonies to pour liquids

(Greek rhuton, from neuter of rhutos, "fluid, liquid") A hornlike drinking vessel of ceramic or metal, often having a pointed end shaped like an animal or animal's head.

(10) -- a ritual pouring vessel, sometimes in the shape of an animal head; a drinking horn (Pedley, 356)

A vessel in the shape of a figure or an animal, used for drinking or pouring liquids on special occasions.

a drinking vessel in the form of an animal or mythological creature (ATA fig. 2-29)

(Greek) A drinking vessel used in many parts of the ancient world. Most ancient glass rhytons are of the Roman period. They are in the form of a horn, sometimes with the head of an animal at the tip. The tip is perforated, and one drank from it by holding the rhyton above one's head and catching the stream of liquid in the mouth.

Rhyton (plural rhyta) is the ancient Greek word (ῥυτόν rutón) for a container from which fluids were intended to be drunk, or else poured in some ceremony such as libation.