Thalamocœle to That
Thalamocœle
(Thal"a*mo*cœle`) n. [Thalamic + Gr. koi^los hollow.] (Anat.) The cavity or ventricle of the
thalamencephalon; the third ventricle.
Thalamophora
(||Thal`a*moph"o*ra) n. pl. [NL., fr. Gr. qa`lamos chamber + to bear.] (Zoöl.) Same as
Foraminifera.
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.) (a) Same as Thallus. (b) The receptacle of a flower; a torus.
Thalassian
(Tha*las"si*an) n. [From Gr. the sea.] (Zoöl.) Any sea tortoise.
Thalassic
(Tha*las"sic) a. (Geol.) Of or pertaining to the sea; — sometimes applied to rocks formed
from sediments deposited upon the sea bottom.
Thalassinian
(Thal`as*sin"i*an) n. (Zoöl.) Any species of Thalaassinidæ, a family of burrowing macrurous
Crustacea, having a long and soft abdomen.
Thalassography
(Thal`as*sog"ra*phy) n. [Gr. sea + -graphy.] The study or science of the life of marine
organisms. Agassiz.
Thaler
(||Tha"ler) n. [G. See Dollar.] A German silver coin worth about three shillings sterling, or about
73 cents.
Thalia
(Tha*li"a) n. [L., fr. Gr. Qa`leia, originally, blooming, luxuriant, akin to qa`llein to be luxuriant.]
(Class. Myth.) (a) That one of the nine Muses who presided over comedy. (b) One of the three Graces.
(c) One of the Nereids.
Thaliacea
(||Tha`li*a"ce*a) n. pl. [NL. See Thalia.] (Zoöl.) A division of Tunicata comprising the free-
swimming species, such as Salpa and Doliolum.
Thalian
(Tha*li"an) a. Of or pertaining to Thalia; hence, of or pertaining to comedy; comic.
Thallate
(Thal"late) n. (Chem.) A salt of a hypothetical thallic acid.
Thallene
(Thal"lene) n. (Chem.) A hydrocarbon obtained from coal-tar residues, and remarkable for its
intense yellowish green fluorescence.
Thallic
(Thal"lic) a. (Chem.) Of or pertaining to thallium; derived from, or containing, thallium; specifically,
designating those compounds in which the element has a higher valence as contrasted with the thallous
compounds; as, thallic oxide.
Thalline
(Thal"line) a. (Bot.) Consisting of a thallus.
Thalline
(Thal"line) n. [Gr. a young shoot or branch.] (Chem.) An artificial alkaloid of the quinoline
series, obtained as a white crystalline substance, C10H13NO, whose salts are valuable as antipyretics; - -
so called from the green color produced in its solution by certain oxidizing agents.
Thallious
(Thal"li*ous) a. (Chem.) See Thallous.
Thallium
(Thal"li*um) n. [NL., fr. Gr. young or green shoot or branch, twig. So called from a characteristic
bright green line in its spectrum.] (Chem.) A rare metallic element of the aluminium group found in
some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric
