monozoic

from The Century Dictionary.

• In zoology, having a single central capsule, as a radiolarian.
• In Coccidiidea, producing only one falciform body: as, a monozoic spore. Contrasted with dizoic and so on to polyzoic, 3.
• In cestodos, having only one set of generative organs, as in the unsegmented Archigetes. Contrasted with polyzoic, or segmented forms like Tænia.