proglottis

from The Century Dictionary.

• noun A detachable sexually mature segment of a cestoid worm; one of the zoöids of the Scolecida, propagated by gemination from a scolex, which in their turn produce ova; a proglottid, or generative joint.

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

• noun (Zoöl) One of the free, or nearly free, segments of a tapeworm. It contains both male and female reproductive organs, and is capable of a brief independent existence.

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

• noun One of the free, or nearly free, segments of a tapeworm. It contains both male and female reproductive organs, and is capable of a brief independent existence.