Defn: Of or pertaining to the otocrane.

OTOCYST
O"to*cyst, n. Etym: [Oto- + cyst.] (Zoöl. & Anat.)

Defn: An auditory cyst or vesicle; one of the simple auditory organs of many invertebrates, containing a fluid and otoliths; also, the embryonic vesicle from which the parts of the internal ear of vertebrates are developed.

OTOGRAPHY
O*tog"ra*phy, n. Etym: [Oto- + -graphy.]

Defn: A description of the ear.

OTOLITH; OTOLITE
O"to*lith, O"to*lite, n. Etym: [Oto- + -lith, -lite.] (Anat.)

Defn: One of the small bones or particles of calcareous or other hard substance in the internal ear of vertebrates, and in the auditory organs of many invertebrates; an ear stone. Collectively, the otoliths are called ear sand and otoconite.

OTOLITHIC; OTOLITIC
O`to*lith"ic, O`to*lit"ic, a. (Anat.)

Defn: Of or pertaining to otoliths.

OTOLOGICAL
O`to*log"ic*al, a.