Thalassic, tha-las′ik, adj. pertaining to the smaller seas—opp. to Oceanic: (zool.) pelagic.—ns. Thalassoc′racy, Thalassoc′raty, the sovereignty of the seas; Thalassog′rapher, a student of the phenomena of the ocean.—adj. Thalassograph′ic.—ns. Thalassog′raphy, the science of the ocean, oceanography; Thalassom′eter, a tide-gauge. [Gr. thalassa, the sea.]
Thaler, tä′lėr, n. a dollar, in Germany a silver coin worth about 3s. [Ger. Cf. Dollar.]
Thalia, thā-lī′a, n. one of the nine muses, who presided over pastoral and comic poetry.—adj. Thālī′an. [Gr. Thaleia, Thalia—thallein, to bloom.]
Thalictrum, thā-lik′trum, n. a genus of perennial herbs of the Crowfoot family, the meadow-rues: a plant of this genus. [Gr. thaliktron—thallein, to bloom.]
Thallium, thal′i-um, n. a metal closely resembling lead in colour and softness, but slightly heavier, first discovered in 1861, and so called from the presence of an intense green line in the spectrum of the flame in which it is volatilised.—adjs. Thall′ic, Thall′ious. [Gr. thallos, a green shoot.]
Thallus, thal′us, n. a vegetative body showing little or no differentiation into leaf, stem, and root, and characteristic of the Thall′ophytes or lower Cryptogamia, including algæ, fungi, and lichens.—adjs. Thall′iform, of the form of a thallus; Thall′ine, Thallod′ic, pertaining to a thallus.—n. Thall′ogen, a thallophyte.—adjs. Thallog′enous, belonging to the thallogens; Thall′oid, Thall′ose, resembling a thallus.—ns. Thall′ōme, a thallus; Tham′nium, the branched shrub-like thallus of fruticulose lichens. [Gr. thallos, a young shoot.]
Thalweg, tal′vāh, n. the deepest part of a valley. [Ger., thal, valley, weg, way.]
Thammuz=Tammuz (q.v.).
Than, than, conj. when, as, if compared with—a word placed after the comparative of an adjective or adverb between the things compared. [A.S. thonne, in its use a relative or conjunctive adverb, equivalent to our when, used after comparatives to introduce the standard of comparison; closely allied to thone, accus. masc. of def. art. Cf. The.]
Thanatoid, than′a-toid, adj. looking like dead: deadly.—adj. Thanatognomon′ic, indicating death.—ns. Thanatog′raphy, an account of one's death; Thanatol′ogy, the scientific consideration of death; Thanatophō′bia, a morbid dread of death; Thanatop′sis, a view of, or reflection upon, death; Thanatō′sis, death of a part, gangrene. [Gr. thanatos, death.]