D defs.my
Entry 2 senses Webster, 1913

Thalamus

/thăl'-əm-əs/ · Thal·a·mus · IPA /ˈθæləməs/
01 n. A mass of nervous matter on either side of the third ventricle of the brain; -- called also optic thalamus.
pl. Thalami ((#))
  1. 1.
    A mass of nervous matter on either side of the third ventricle of the brain; -- called also optic thalamus.(Anat.) Also: optic thalamus
  2. 2.
    Same as Thallus.(Bot.) See: Thallus