Oncosphere

Part of speech: noun

Definitions

1. A specific immature form of parasitic worms that features a six-hooked larval structure, typically found within the tissues of a host organism
2. This term refers to the early developmental phase of certain parasites, marked by the presence of a hexacanth embryo inside a host environment
3. An immature stage of certain parasitic worms characterized by a six-hooked larval form usually present within a host’s tissues

Etymology: Oncosphere is a technical coinage, built from two Greek-derived pieces. The first, "onco-", comes from Greek "onkos", meaning "lump" or "mass", and it is the same combining form that appears in "oncology", the study of tumours. The second, "-sphere", comes from Greek "sphaira", meaning "ball" or "globe", and gives the word its sense of a round body. Put together, the word describes the small, spherical larval stage of a tapeworm, a six-hooked embryo that hatches inside the host's gut and then migrates through the body. The name refers to its rounded shape. Its literal sense, a "lump-ball", is a plain description rather than a metaphor, and the word was assembled deliberately by biologists to name this specific stage of the parasite's life cycle.

Synonyms: larva, egg, cysticercus