148 



A GLOSSARY OF TERMS 



The interlacement or union of 

 many things which form a body, 

 as threads of flax, silk, wool, &c., 

 of which cloths and stuffs are 

 made. From analogy the term is 

 employed to describe the sub- 

 stances of which the organs of 

 plants and animals are composed. 



TOLA'MEN. A border. 



IOMENTOSE. In botany, closely and 

 densely hairy. 



TOME'NTUM. In botany, applied to 

 the hairs of plants when they are 

 entangled, and closely pressed to 

 the stem. 



TOOTHED. In botany, divided so as 

 to resemble teeth. 



TOOTHIETTED. In botany, furnish- 

 ed with little teeth. 



TO'PAZ. A crystallized mineral, 

 harder than quartz, of a yellow 

 wine colour. 



TOHO'SE. In botany, uneven ; alter- 

 nately elevated and depressed. 

 In conchology, swelling into knobs 

 or protuberances. 



TORPE'DO. Lat. Numbness, Name 

 of a fish. 



Toa'dUiLLA. fr. lat. torqueo, I writhe, 

 I twist. Systematic name of the 

 wryneck. 



TOR'TRIX. Generic name of certain 

 ophidians. 



TOK'TUOSK. Twisted. 



TOR'ULOSE. Slightly torose. 



TO'RUS. - Thalamus. The terminaj 

 portion of the pedicil, 



TOTIPALMA'T^. fr. lat. totus } the 

 whole ; palma, the palm. Syste- 

 matic name of a family of web- 

 footed birds. 



TOUGH. Minerals which show de- 

 pressions or bruises from frequent 

 blows, in the attempt to fracture 

 them, are said to be tough. 



TOIT'IIMAI.I!*E. A mineral substance 

 consisting of a boro-silicate of alu- 

 mine, harder than quartz, but not 

 as hard as topaz. 



TOX'OTES. fr. gr. toxotes, an archer. 

 Systematic name of certain fishes. 



TKA'CHEA. fr. gr. trachus, rough ; ar- 



teria, an artery, which is formed 

 from aer, air, and terein, to keep. 

 The canal which conveys the air 

 to the lungs. The windpipe. 



TRA'CHEAI.. Relating to trachea. 



TRA'CHEJE. Lat. plur. of trachea. 

 Tubes or vessels in the structure 

 of plants, as well as of insects, 

 which are supposed to convey air. 



TRACHEA'RIA. Lat. Tracheal; hav- 

 ing tracheae. 



TRACHE'NCHTMA. fr. gr. tracheia, 

 air-tube ; egchuma, anything pour- 

 qd in. The vascular tissue of 

 plants, consisting of spiral vessels, 

 which resemble the trachea of in- 

 sects. 



TRA'CHTTE. fr. gr. trachus, rough. 

 A variety of lava. A feldspathic 

 rock, which often contains glassy 

 feldspar and hornblende, When 

 the feldspar crystals are thickly 

 and uniformly disseminated, it is 

 called trachytic porphyry. 



TRANSI'TIOIT FORMA'TIOI*. A geolo- 

 gical designation of the upper 

 metamorphic rocks, which form 

 a kind of link between the pri- 

 mary and secondary rocks, par- 

 taking of the characters of both. 

 (p. 26, Book viii). 



TRAifSLu'cENT.-fr. lat. trans, through; 

 luceo, to shine. Permitting the 

 passage of light, but not sufficient 

 to define objects. 



TBArspA'RENT.-fr. lat. tran$> through; 

 pareo, to appear. Permitting the 

 passage of light to the extent of 

 enabling qne to perceive the form 

 of objects. 



TRAKSVE'RSE. Placed crosswise. 

 When the breadth pf a shell is 

 greater than its length, it is term- 

 ed transverse. 



TRAP. From the Swedish trappa, a 

 flight of stairs, because trap rocks 

 frequently occur in large tabular 

 masses, rising one above another 

 like the successive steps of a stair- 

 case. Applied to certain igneous 

 rocks composed of feldspar, au- 

 gite and hornblende. 



