one who tastes; especially, one who first tastes food or drink to ascertain its quality.-that in which, or by which, anything is tasted, as, a dram cup, a cheese taster, or the like.-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.