Onchiostyle see odontostyle

onchium n.; pl. onchia [Gr. onkinos, hook] (NEMATA) Stomatal armature, generally in the form of a tooth or teeth originating from the posterior stoma (esophastome). see odontium, esophastome.

onchomiracidium n. [Gr. onkinos, hook; merakidion, youth] (PLATY: Trematoda) 1. A term for an embryo in the egg. 2. The ciliated larva of a monogenetic trematode.

onchosphere, oncosphere n. [Gr. onkinos, hook; sphaira, ball] (PLATY: Cestoda) The shelled embryo; a hexacanth; the first larval stage.

oncogenic a. [Gr. onkos, swelling; gennaein, to produce] Tumor causing.

oncophysis n. [Gr. onkos, swelling; physis, growth] (ARTHRO: Chelicerata) Any extension of an arthrodial membrane, usually in the form of a more or less hyaline intumescence.

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