‖n. [ NL. See Thalamus, and Encephalon. ] (Anat.) The segment of the brain next in front of the midbrain, including the thalami, pineal gland, and pituitary body; the diencephalon; the interbrain. [ 1913 Webster ]

a. (Anat.) Of or pertaining to a thalamus or to thalami. [ 1913 Webster ]

{ } a. [ See Thalamus, and Floral. ] (Bot.) Bearing the stamens directly on the receptacle; -- said of a subclass of polypetalous dicotyledonous plants in the system of De Candolle. [ 1913 Webster ]

n. [ Thalamic + Gr. koi^los hollow. ] (Anat.) The cavity or ventricle of the thalamencephalon; the third ventricle. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. qa`lamos chamber + fe`rein to bear. ] (Zool.) Same as Foraminifera. [ 1913 Webster ]

‖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 ]

n. [ From Gr. qa`lassa the sea. ] (Zool.) Any sea tortoise. [ 1913 Webster ]

a. [ Gr. qa`lassa the sea. ] (Geol.) Of or pertaining to the sea; -- sometimes applied to rocks formed from sediments deposited upon the sea bottom. [ 1913 Webster ]

n. (Zool.) Any species of Thalassinidae, a family of burrowing macrurous Crustacea, having a long and soft abdomen. [ 1913 Webster ]

n. [ Gr. qa`lassa sea + -graphy. ] The study or science of the life of marine organisms. Agassiz. [ 1913 Webster ]