Thalamus \Thal"a*mus\, n.; pl. {Thalami}. [L. thalamus chamber,
Gr. qa`lamos.]
1. (Anat.) A mass of nervous matter on either side of the
third ventricle of the brain; -- called also {optic
thalamus}.
[1913 Webster]
2. (Bot.)
(a) Same as {Thallus}.
(b) The receptacle of a flower; a torus.
[1913 Webster]