the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Rotifera > [noun] > member of > trochal apparatus (3)
Anatomy, etc. Applied to various parts of the body resembling or likened to a crown; also to the… The trochal disc of a rotifer, etc.
Applied to the trochal apparatus of a rotifer or wheel-animalcule.
Zoology. The internal ring of cilia in the trochal organ of a rotifer.