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A GLOSSARY OF TERMS 



ARGILLA'CEOUS. Of the nature of 

 clay. 



ARGILLA'CEOUS-SCHIST. Clay slate, 

 or argillite. 



AR'GII.LITE A slaty rock of fine 

 texture, with a faintly glistening, 

 or earthy surface of fracture, and 

 mostly of a dark colour. Roofing 

 slate, and nova'culite or hone-slate 

 are varieties of argillite. 



ARGILO-AREITA'CEOTJS. Partaking of 

 the nature of both clay and sand. 



AR'GONAUT. fr. gr. Jlrgo, name of 

 a vessel; Nautes, a navigator. The 

 Grecian princes who attempted 

 the conquest of the Golden Fleece, 

 in the ship drgo, under the com- 

 mand of Jason, were called Argo- 

 nauts. Systematic name of a ce- 

 phalopod. (p. 28, Book v.) 



AR'GOWAU'TA. Lat. Argonaut. 



AR'GUS. The name of a hero in 

 mythology, who was said to have 

 had a hundred eyes, fifty of which 

 were open while the other fifty 

 slept; after his death,Juno changed 

 him into a peacock. From the 

 spots in its tail, sometimes called 

 eyes, this name has been applied 

 to a species of pheasant. 



ARIES. Lat. A ram. 



ARIETI'NA. Lat. Belonging or re- 

 lating to a ram. 



A'RIL. A coat or covering of cer- 

 tain seeds, formed by the expan- 

 sion of the funicula or placenta. 



ARI'LLUS. Lat. Aril. 



ARI'STATE. Awned. 



ARISTOLOCHI'A. fr. gr. arisos, excel- 

 lent; lochas, female; because it 

 was supposed to be excellent for 

 females in particular conditions. 

 Name of a family of plants. 



AR'KOSE. A name given to different 

 metamorphic sandstones. 



ARMADI'LLO. Sp. diminut. of arma- 

 da, armed. An edentate mammal, 

 named Tatou in Brazil. 



A.RM'ATURE. Armour. The arma- 

 ture of the mouth consists of the 

 teeth, &c. 



A.RMETU'ACA. Lat. Armenian. 



AROMA' TIC. fr. gr. aroma, an odour 

 Spicy; fragrant. 



ARTER'IAL. Belonging or relating 

 to arteries. 



ARTERIAL'ISED. When venous or 

 dark blood, by the process of res- 

 piration, is converted into arterial 

 blood, it is said to be arterialised. 



ARTE'RT. fr. gr. aer, air ; terein, to 

 preserve ; because it was anciently 

 believed that the arteries were 

 filled with air like the windpipe. 

 The vessels which convey blood 

 from the heart to~all parts of the 

 body, are called arteries. 



ARTE'SIAN. From Jlrtois, name of 

 a province of France where es- 

 pecial attention has been given 

 to a means of obtaining water, 

 which consists in boring vertical 

 perforations of small diameter in 

 the exterior crust of the earth, 

 frequently of great depth. These 

 are termed Artesian wells. 



ARTI'CUIAR SURFACE. The surface 

 of that part of a bone which 

 forms an articulation or joint. 



ARTICTTI-A'TA. The same derivation 

 as articulate. Animals whose 

 bodies seem to consist of a series 

 or succession of rings. They con- 

 stitute the third BRANCH of the 

 animal kingdom, which includes 

 Insects, Crustacea, Worms, &c. 



ARTICULATE. fr. lat. articulus, the 

 diminutive of artus, a limb, de- 

 rived fr. gr. arthron, a joint. To 

 join or joint. To form words ; to 

 utter. 



ARTICULA'TIOIT. fr. lat. articulus, a 

 joint. A joint betwixt bones. 



ARTOCA'RPTTS. fr. gr. artos, bread ; 

 karpos, fruit. Generic name of 

 the bread-fruit tree. 



ARUNDINA'CEOTJS. fr. lat. arundo, a 

 reed. Resembling reeds. 



ARVA'LIS. Lat. Relating to fields. 



ARVE'NSIS. Lat. from arvum,a, field. 

 Relating to fields. 



ARVICOLA. Lat. arvum, a field ; co- 

 lere, to cultivate. Generic name 

 of field mice. 



