(1):

(n.) One who tastes; especially, one who first tastes food or drink to ascertain its quality.

(2):

(n.) That in which, or by which, anything is tasted, as, a dram cup, a cheese taster, or the like.

(3):

(n.) One of a peculiar kind of zooids situated on the polyp-stem of certain Siphonophora. They somewhat resemble the feeding zooids, but are destitute of mouths. See Siphonophora.