- An organ of Ctenophora, perhaps a sensory organ. Its a black speck when you look at the depression regarding aboral region of the human body.
- An organ associated with Ctenophora, said to be physical.
- The characteristic sense-organ for the ctenophorans, seen as probably an auditory pill; a sizable vesicle situated during the aboral pole, with a clear liquid and vibratile otoliths. See Ctenophora.