TENTACLES 



323 



TERTIARY 



Tentacles, (ten'ta-klz). [Tentaculum, q.v.]= 

 Feelers; organs of sensations, sometimes also 

 of prehension; in Cyaiuea, 30 to 40 ft. long. 



Tentaculum, ( ten-tak'u-lum ). [ The Latin 

 wor<l.]=Feeler. v. Tentacles. 



Tenthredo, (ten-threAlo). [The Greek name.] 

 = S;iw fly: an insect, the type of the family 

 Tenthridinidse, belonging to Hymenoptera. 



Tentorium.(ten-to'ri-um). [L. tentorium,tent.] 

 A membrane in the brain, dividing the cere- 

 brum from the cerebellum. 



Tenuirostres, (ten-ii-i-ros'trez). [L. tenuit, 

 slender; rostrum, beak.] Perching birds with 

 slender beaks, forming a sub-division of 

 Insassores, q.v. 



Ter, (ter). [L. ter, thrice.] A prefix imply- 

 ing three, as ter-stearin, ter-valent, &c. 



Terbia, (ter'bi-a). A supposed metallic oxide 

 r=a compound of erbia and vttria. 



Terbium, (te/bi-um). [Terbia, q.v.} The 

 supposed metallic base of terbia, q.v. 



Terchloride, (ter-klo'rld). [Ter ami Chloride, 

 q.r.] = Trichloride: a compound of three 

 atoms of chlorine with one of another ele- 

 ment, as SnClj. 



Terebenes, (ter'e-benz). [Terebinth, q.v.]=. 

 G'ioHi8=. Camphogens; a group of isomeric 

 hydrocarbons, of which oil of turpentine is 

 the type, which, when combined with water, 

 form crystalline camphor -like substances; 

 also called Camphenes. 



Terebenthene, (ter-e-ben'then). [Terebinth, 

 q.v.] A hydrocarbon found in oil of turpen- 

 tine. 



Terebic acid, (ter'e-bik). [Terebene, q.v.]= 

 C/HioO^ a crystalline substance obtained by 

 acting on rosin with nitric acid. 



Terebinth, ( terVbinth ). [ Terebinthos, the 

 Greek name.]=Tiirpentine 

 tree: a tree belonging to 

 Pistiaceae. 



Terebra, (terVbra). [ L. 

 terebro, I bore.]=Subula: a 

 boring molluscous animal. 



Terebrantia, (ter-e-bran'shi-a. ) 

 (L. terebro, I bore. ]= Borers: 

 insects belonging to Hyme- 

 noptera. 



Terebratula, ( ter-e-brat'ii-la ). 

 borer.] Lamp-shell: a genus of marine bra- 

 chiopoda. 



Terebratula Fimbria. Terebratula Carinata. 



Terebratulidae, (ter-e-bra-tu'li-de). [Terebra- 

 tula, q.v.; Gk. eidos, form.] A family of 

 animals belonging to Brachiopoda, of which 

 the lamp-shell is the type: found from 

 Devonian to present time. 



Terecamphen, (ter-e-kam'fen). [Terebene and 



Cam;>hene.] C 10 H 16 : a white camphor-like 

 substance, obtained from oil and turpentine. 



Teredo, (te-re'do). [Teredo, the Latin name.] 

 A molluscous animal belonging to Pholadid.'c, 

 a family of Lamellibrauehiata. T. navalis= 

 Ship-worm. 



Tergal, (ter'gal). Related to the tergum, q.v. 



Tergum, (ter'gum). [L. tergum, back.] In 

 Crustacea, the convex upper plate of each, 

 segment. 



Terminations. In chemistry, -tc (e.g., pallad- 

 ic, nitric, <fco.) is used to express the most 

 highly oxidised compound of a series; and 

 oun for the next less highly oxidised com- 

 pound of the same series; e.g., palladioxis, 

 nitrous, &c. 



Termes, (tfr'mCz). [L. tarmes, a wood worm.] 

 = White ants: insects belonging to Neurop- 

 tera. v. Termites. 



Terminology, (ter-min-ol'o-ji). [L. terminus, 

 term; Gk. logos, discourse.] The science of 

 technical terms. 



Termitarium, (ter-mi-ta'ri-nm). [Termes, q.v.] 

 Dwelling of a colony of tonnes, or white 

 ants. 



Termites, (ter'mi-tez). [Termes, <7.v.]=White 

 ants: small soft-bodied insects, living in com- 

 munities, belonging to Neuroptera. 



TermitinsB, (ter-mi-ti'ne"). [Termes, q.v.]= 

 Corrodentia: a division of Neuroptera, in- 

 cluding white ants. 



Tern, (tern). [Terne, the Danish name.]= 

 Sterna hinindo: a bird belonging to Natato res; 

 also called Sea-swallow. 



Ternate, (t^r'nat). [L. terni, three each.] 

 Three-fold: triple. T. leaf: a compound leaf 

 having three leaflets. 



TernstromiacesB, (tern-stro-mi-a'se-e). [Tern- 

 strom, a botanist. ]=Theads=rTea, &c.: trees 

 and shrubs, with leathery leaves, belonging to 

 Guttiferales. 



Terpine, ( tei y p5n ). [ Terebene, q.v. ] 

 Ci H 16 2H 2 O=a variety of hydrated oil of 

 turpentine. 



Terpinol, ( ter'pi-nol ). [ Terebene, q.v. ]= 

 C2oH32.H2O=a variety of hydrated oil of 

 turpentine. 



Terra cotta, (ter'ra ko'ta). [The Italian name.] 

 Baked clay : used for pottery, small statuary, 

 &c. 



Terrapin, (ter'ra-pSn). [Terrapene, the French 

 name.]=Emys, q.v. 



Terrestrial, (ter-res'tri-al). [L. terra, earth.] 

 Related to the earth. 



Terrier, (ter'ri-er). [The French name.] A 

 variety of the dog, 

 characterised by its 

 courage and anti- 

 pathy to vermin. 



Tertians, (ter'shi-anz). j 

 [L. tertius, third.] 

 Curves of third de- 

 gree. 



Terti ary, (ter'shi-a-ri). 

 [L. tertius, third.] Scotch Terrier. 



=Cainozoic: a general term for all the rocks 

 between Secondary and Recent, now includes 

 Eocene, Miocene, and Pliocene, originally 

 given to alluvial and similar beds. T. colours 



