1. One who
tastes; especially, one who first
to ascertain its characteristic. "Thy tutor be thy taster, ere thou eat." (Dryden)
2. That in which, or by which, anything is tasted, as, a dram
cup, a cheese
taster, or the like.
3. One of a peculiar kind of zooids located on the polyp-stem of determined Siphonophora. They somewhat resemble the feeding zooids, but are destitute of mouths. See Siphonophora.
Source: Websters Vocabulary