资料来源 : Webster's Revised Unabridged Dictionary (1913)

Modiolus \Mo*di"o*lus\, n.; pl. {Modioli}. [L., a small
   measure.] (Anat.)
   The central column in the osseous cochlea of the ear.

资料来源 : WordNet®

modiolus
     n : the central conical bony pillar of the cochlea
     [also: {modioli} (pl)]

modioli
     See {modiolus}