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3. optic thalamus

The Collaborative International Dictionary

optic thalamus

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.

2. (Bot.)

   1. Same as Thallus.

   2. The receptacle of a flower; a torus.