before a vowel thalam-, combining form of Gr. θάλαμος THALAMUS, used as a formative in some anatomical words. Thalamocœle [Gr. κοιλία cavity, ventricle], the cavity of the thalamencephalon; the third ventricle of the brain. Thalamocrural a., of or pertaining to the optic thalamus and to the crus cerebri (CRUS 2 b). See also THALAMENCEPHALON.
1899. Syd. Soc. Lex., Thalamocœle, cavity of thalamencephalon. The thalamic cœlia, or third ventricle. Ibid. Thalamocrural.
