polypite

from The Century Dictionary.

• noun The fundamental element in the structure of a polyp, as a hydrozoan or an actinozoan; an individual zoöid of a compound polyp; one of the individuals or persons which together fabricate and constitute a polyp-stock or polypary; a hydranth.
• noun A fossil polyp.

from the GNU version of the Collaborative International Dictionary of English.

• noun One of the feeding zooids, or polyps, of a coral, hydroid, or siphonophore; a hydranth. See Illust. of campanularian.
• noun Sometimes, the manubrium of a hydroid medusa.
• noun (Paleon.) A fossil coral.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun rare A fossil polyp
• noun rare An individual polyp of a colonial cnidarian