Thal·a·mus n.; pl. Thalami
1. Anat. A mass of nervous matter on either side of the third ventricle of the brain; -- called also optic thalamus.
2. Bot. (a) Same as Thallus. (b) The receptacle of a flower; a torus.
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thalamus
n : large egg-shaped structures of gray matter that form the
dorsal subdivision of the diencephalon
[also: thalami (pl)]