TESSELATED 



324 



THEBAIA 



= Primary hues: made by nnioti of secondary 

 colours; a general term=third. 



Tesselated, (tes-se-la'ted). [L. tesseUa, small 

 cube.] Formed in small squares like a chess- 

 board; also used generally for patterns in tile 

 work. 



Test, (test). [1. The French word; 2. L. 

 testa, shell.] 1. A substance used to detect 

 the presence of some given supposed consti- 

 tuent in a chemical compound; also called 

 Re-agent. 2. A shell or thick coveting, v. 

 Teatacea. 



Testacea, (tes-ta'se-a). [L. testa, shell.] Mol- 

 lusca having shells. 



Testudo, (tes'ttt'do). [The Latin name.]= 

 Tortoise: an animal belonging to Chelonia, 



Tetanus, (tet'a-nus). [Gk. teino, I stretch.] 

 1. A general term for a convulsive affection of 

 the muscles of volition. 2. = Locked -jaw: an 

 affection of the muscles of the lower jaw 

 which prevents mastication and swallowing. 



Tethys, (tc'this). [Classical.] A star. 



Tetra- (tet'ra). [Gk. tetra-, four.] A prefix 



implying fonr. 

 Tetrabranchiata, 



Tetrabranchiata, (tet-ra-brang-ki-a'ta). [Gk. 



tetra-, four; bragchia, gill.] Molluscs having 



four gills, a less highly organised division 



of Cephalopoda, having numerous anus, but 



no suckers or ink-bag. 

 Tetrachlcrides=Compounds of four atoms of 



chlorine with one atom of a metal. 

 Tetracrylic acid=C4H 6 O 2 =Solidcrotonic acid. 

 Tetrad, (tet'rad). [Gk. tetra, four.] A chemi- 



cal element, one atom of which is equivalent, 



in combination, to four atoms of hydrogen. 

 Tetradecapoda, (tet-ra-de-kap'o-da). [Tetra 



and Decapoda, q.v.} De Blainville's term (or 



Am i ili i pi ni, -i and Isopoda. 

 Tetradymite, (tet-rad'i-mit). [Gk. tetradymot, 



fourfold.] A mineral, chiefly telluride of bis- 



muth and sulphur. 

 Tetragon, (tet'ra-gon). [Gk. tetra-, four; gonia, 



angle.] A four-cor 



Tetragons. 



nered figure : espe- 



cially a square. 

 Tetragoniceae,(tet-ra- 



gou-i-a'se-e). [ Tet ra- 



gonia, the typical 



genus. ] = Aizoons : 



herbs, with succulent 



leaves, belonging to 



Ficoidales. 

 Tetragonolepis, ( tet-ra-gon-ol'e-pis ). [ Gk. 



tetra, four; gonia, angle; lepis, scale.] A 



ganoid fish found fossil in Lias rocks. 

 Tetrahedron, (tet-ra-he'dron). [Gk. tetra-, 



fonr: hedra, face.] A solid 



figure bounded by four 



triangular surfaces. 

 Tetrao, ( tet'ra-o ). [The 



Greek name.] = Grouse: a 



bird, the type of Tetra- 



onidae, q.v. 

 Tetraonid8e,(tet-ra-on'i-de). 



[Tetrao, q.v.; Gk. eidos, Tetrahedron. 



form.] A family of birds belonging to Rasores, 



including the grouse, ptarmigan, &c. 

 Tetratomic. v. Tetrads. 



Tetryl, (tet'ril). [Tetrylic, q.v. ]=C 8 H 18 = 

 Butyl=Ditetryl: a liquid hydrocarbon ob- 

 tained by the distillation of coal, and fium 

 potassic valerate, &c. 



Tetrylene, (tet'ri-len). [Tetrylic, 9-r.]=C 4 II 8 

 =Butylene=Oil gas: a gaseous ludioeai i><>n 

 of the oil-fine series, first obtained by the 

 distillation of oil. 



Tetrylia, (tet-ri'li-a). [Tetrylic, 9.t'.]=C 4 TI n X. 

 an alkaline base obtained from ti-u \ 1 .tlmlml: 



Tetrylic, (te-trilik). A new name for 

 butylic. 



Teucrium, (tu'cri-um). [Teucer.]=Germander: 

 an herb belonging to Laruiaceaa. T. scorodonia 

 =Wood sage. 



Teuthidae, (to/thi-de). [Gk. teuthis, sleeve- 

 fish; eidos, form.] Calamaries: a sub-divi- 

 sion of Sepiadse. 



Textile, (teks'tll). (Textilis, the Latin word.] 

 Woven. T. fabrics: cotton, linen, woollen, 

 and other cloths formed by weaving. 



Thalamiflorae, (thal-a-nii-flo're). [Thalamus, 

 <?.r.J Plants having the stamens free tnnii 

 the calyx and generally inserted on a u- 

 ceptacle or disc. 



Thalamus, (thal'a-mus). [Gk. thalamos, bridal 

 chamber.] The portion of a flower stem from 

 which the calyx, corolla, <tc., grow out. 

 Thalassicolla, (thal-a-sik'ol-a). [Gk. */</<.</, 



sea; kullu, glue.]=Transparent, colourless, 

 gelatinous masses, found floating in sea 

 water, belonging to Protozoa. 



Thalictrum, (thal-ik'tmm). [Thaliktrnn, the 

 Greek name.] An herb belonging to llanun- 

 culaceie. 



Thallioui, (thal'li-us). [Thallium, q.v.] Re- 

 lated to thallium, q.v. 



Thallium, (thnl'li-um). [Gk. thaUos, a green 

 twig. ]=Tl': a heavy lead-like, diamagnetio 

 in-t.il, named from a brilliant green line in 

 its spectrum; found in iron pyrites. 



Thallogens, (thal'16-jenz). [Thallus. q.v.]= 

 Fungi, lichens, &c. : flowerless plants, of 

 cellular structure, having no proper stem. 



Thallophytes, (thal-16-fi'tez). [Gk. thullos, 

 green twig; phyton, plant.] Cryptogiiiiiou.s 

 plants in which the stem and foliage are not 



distinct. 



Thallus, (thal'lus). [The Latin word.] The 



portion of a flowerless plant which produces 



the reproductive organs. 

 Thanatophidia,(than-a-to-fid'i-a). fGk. tJtona- 



tos, death; Ophidia, q.v.] Poisonous snakes 



of India. 

 Thanet beds, (than'et). [Isle of Thanet.] The 



lowest of the Lower Eocene strata, resting on 



the chalk. 

 Thapsia, (thap'si-a). [Gk. thapto, I bury.]= 



Deadly carrot: a plant belonging to Apiaceje. 

 Thaumatrope, (thaw'ma-trop). [Gk. thauma, 



wonder; tropeo, I turn.] An optical apj)aia- 



tus, in which a number of rigures pass rapidly 



before the eye, and appear like one in which 



the parts are in motion. 

 Thaumops. [Gk. thamnops, strange face.] An 



amphipod crustacean, discovered in 1873. 

 Thea, (te'a). [Tsui, the Chinese name.]= Tea- 

 plant: a plant belonging to Ternstrcemiaceic. 

 Thebaia=Ci9HoiN03=Parauiorpbia: an alka- 



