BOCKS 



ROSANILINE 



solid material, whether in large or small 

 pieces, which forms part of the earth's crust. 

 Farewell R. =Millstone grit, q.v. R. cork= 

 A fibrous variety of asbestos. .R. cress= 

 Arabis. R. crystal = A pure colourless 

 variety of quartz. R. formation, v. Petro- 

 logy. R. hair Zic/te)i=Alectoria jubata. R. 

 leather, v. Asbestos. R. moss = Cudbear 

 lichen =Lecanora tartarea. R. oii=Mineral 

 naphtha. R. ?-ose=Cistus, now called Heli- 

 anthemum. R. salt: beds of chloride of 

 sodium, or common salt. R. slaters = 

 Ligia, crustaceans belonging to Isopoda. 

 R. ?t>ar&ter:^Origma=Saxicola solitaria. 

 Rocks. Classified as aqueous, metamorphic, 

 plutonic, and volcanic. 



Rocket, (rok'et). [Roquette, the French name .] 

 Diplotaxis : an herb, belonging to Brassi- 

 cacese. London -R.=Sisymbiiuin irio. Sea 

 R. =Cakile. Yellow R. =Barbarea. 

 Rocking-stone=Logan, q.v. 

 Rod. Golden J?.=Solidago. 

 Rodentia, (rd-den'shia). [L. rodens, gnawing.] 

 Glires: gnawing animals, belonging to 

 Mammalia, including rats, squirrels, hares, 

 beavers, porcupines, <fec. 

 Rods and Cones of the eye: minute cone-like 

 bodies and rods forming the surface of the 

 retina in contact with the pigment .cells 

 lining the choroid. 



Roe, (ro), [Ger. rogen, spawn.] Ovary and 

 eggs of fish. Soft 

 .R.=Milt=Testes 

 of male fish. R. 

 buck (rdh, the 

 A.-S. name], an 

 animal belonging 

 to Cervidte. R. 

 stone=0olite, 

 q.v., named from 

 the egg-like ap- 

 pearance of the 

 concretions. Roebuck. 



Roger's nomenclature, [Mr. Rogers, an 

 American geologist.] Of geology, especially 

 of American rocks. 



Rolandi. Fissure of R. : in the brain. 

 Roller. A crow-like bird.belongingtoCorvidae. 

 Rolleston's classification: of animals. [Pro- 

 fessor R. of Oxford.] 

 Vertebrata. 



Allan toidea. 

 Mammalia. 

 Sauropsida. 

 Anallantoidea. 



Icththyopsida. 

 Mollusca. 



Odontophora. 

 Anodontophcra. 

 Molluscoidea. 

 Arthropoda. 

 Tracheata. 

 Branchiata. 

 Vermes. 



Annulata. 

 Annuloida. 

 Echinodermata. 

 Ccelenterata. 

 Protozoa. 



Mansard roof. 



Roman. R. architecture; derived chiefly 

 from the Greek; marked by a circular arch 

 and profusion of sculpture. R. cement: a 

 compound of pozzuolana and lime. 



Romanesque, (ro-ma-nesk'). [Roman, 3.17.] 

 Related to, or derived from, the Roman. R. 

 architecture: intermediate between Roman 

 and Gothic; marked by circular arches, deco- 

 rative doorways, small windows, and square 

 massive towers. 



Rood, (rood). [2. A.-S. r6d, cross.] l.=36J 

 square yards= acre. 2. A representation 

 of the Holy Cross. R. loft : a gallery to sup- 

 port the holy rood. 



Roof, (roof). [Hrof, the A.-S. word.] The 

 upper and outer cover- 

 ing of a building. Curb 

 R. = Mansard R., q.v. 

 Gable R. ; terminating 

 in a gable, q.v. Lipped 

 R. formed by four 

 sloping sides. Mansard 

 R. : formed of two sets 

 of rafters, the upper 

 being the more inclined. 



Rook, (rok). [A.-S. rouca, chattering.] 

 bird, belonging to Cor- 

 vidae. 



Root, (root). (Rod, the 

 Danish word.] 1. In 

 mathematics: the num- 

 ber required as the 

 basis to produce, by 

 involution, a given,, 

 number; e.g., 4 is the 

 square root of 4 2 =4 x 4 

 16 ; 5 is the square Rook. 



root of 52=5x5=25; 2 is the cube root of 

 23=2x2x2=8. Square root written thus: 

 \J, or ity; e.g., square rootof 9 is written \/9, 

 or 9; cube root is written thus: ^. 2. In 

 botany, that part of a plant which fixes it 

 to the ground, or whatever it may grow 

 on ; generally descends into the ground, 

 and never has leaves, scales, or buds. 

 Man JR.=Ipomea leptophylla, v. Man. R. 

 fibres of mushroom Mycelium. R. hairs= 

 *Rhizoid. 



Roric figures. [L. ros, dew.]=Breath figures, 

 q.v. 



Rorqual, (rorTcwal). [Norw. rorqualus, a 

 whale with folds.]=Balaenoptera rnusculus : 

 a whale ; v. Cetacea. 



Rosa, (ro'za). [The Latin name.]=Rose: a 

 shrub with large flowers, the type of Rosaceae, 

 R. canina=Vo rose. R. rubiginosa^Sweet 

 briar. 



Rosace8B,(ro-za'se-e). [Rosa,g.v.]=Rose-worts: 

 herbs and shrubs with polypetalous flowers, 

 belonging to Resales: include strawberry, 

 rose, bramble, apple, pear, plum, &c. 



Resales, (ro-za'lez). [Rosa, q.v.] Plants with 

 monodichlamydeous flowers and apocarpous 

 fruits, forming a division of Perigynous Exo- 

 gens, and including Rosaceae, Fabacese, <fec. 



Rosaniline, (ro-zan'i-lin). [Rose and Aniline.] 

 Magenta = C 2 oHi9^3-HaO = Aniline red, 

 one of the aniline dyes. 

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