ROS 



363 



RUB 



tops famish an oil which is 

 tonic, stimulant, and carminat- 

 ive, much used in perfumery, as 

 in the composition of Eau-de- 

 Cologne and Hungary-water. 



rostel, n., rtistf&l, also rostellum, 

 n., rCat-Zl'ltim (L. rostellum, a 

 little beak from rostrum, a 

 beak, a bill), in boL, that part 

 of the heart of a seed which 

 descends and becomes the root ; 

 a peculiar body in Orchids, bear- 

 ing the glands of the pollen mass, 

 with its viscid balls attached ; 

 in anat., a beak-shaped process : 

 rostellate, a., rdst-eV-ldt, having 

 a small beak, or little elongated 

 neck. 



rostrate, a., rost'rdt (L. rostrum, 

 the bill or snout of an animal), 

 in anat., having a process re- 

 sembling the beak of a bird; in 

 bot. , furnished with beaks ; hav- 

 ing a long, sharp point: rostrum, 

 n., rdst'rum, the beak, or suctor- 

 ial organ, formed by the append- 

 ages of the mouth in certain 

 insects ; the frontal spine of the 

 Crustacea ; in anat. , a triangular 

 spine in the middle line of the 

 anterior surface of the sphenoid 

 bone of the skull ; 'the reflected 

 portion of the bend or genu which 

 the 'corpus callosum' forms in 

 its course. 



rotate, a., rot-atf (L. r8tdtum, to 

 turn a thing round like a wheel 

 from rtita, a wheel), in bot., 

 having a regular gamopetalous 

 corolla, with a short tube and 

 spreading limb : rotation, n., 

 rot-d'shun, in anat., the revolv- 

 ing motion of a -bone round its 

 axis ; in bot. , the internal circula- 

 tion of the fluids in the cells of 

 plants: rotate-plane, or rotato- 

 plane, rot-at'-o-, in bot., wheel- 

 shaped, and flat, without a tube : 

 rotation of gy ratio a, in bot., a 

 peculiar circulation of the cell 

 sap, as seen in characese, and 

 others. 



rotator, n., rot-dt'-dr (L. rotdtum t 



to turn a thing round like a 

 wheel from rota, a wheel), in 

 anat., a muscle which gives a 

 circular or rolling motion to a 

 part : rotatory movement, a 

 movement which is circular : 

 rotatores spinae, rdt'at-or'-ez 

 spln'e (L. splna, the spine or 

 'backbone), the rotators of the 

 spine ; eleven pairs of small 

 .muscles, eleven on each side of 

 the spine, each pair passing from 

 the transverse processes of one 

 vertebra, and inserted into the 

 vertebra next above : rotatoria, 

 n. plu., rdt'at-or'i-a, has the 

 same sense as B/otifera, which 



Rotifera, n. plu., rdt-if-Zr-a (L. 

 rdta, a wheel; fero, I carry), a 

 class -of the Scolecida, micro- 

 scopic animals, characterised by 

 a ciliated trochal disc : rotiferous, 

 a., rdt-if-er-us, having or bearing 

 organs like wheels. 



Rottlera, n., rdt'.lZr-a (after Dr. 

 Bottler, a Dane), a genus of plants, 

 Ord. Euphorbiacese : Rottlera 

 tinctoria, tingk-tor^i-a (L. tinc- 

 torms, of or belonging to dyeing 

 from tingo, I dye), a small tree 

 of Abyssinia, India, etc., whose 

 ruby-like glands on its fruit are 

 brushed off, and the powder 

 administered for tape- worm. 



rotula, n., rot'-til-a (L. rtitula, a 

 little wheel from rota, a wheel), 

 in anat., the patella or knee- 

 pan, situated at the front of the 

 knee-joint. 



rubefacient, n., rdb'-Z-fd'shi-ent 

 (L. ruber, red ; facio, I make), 

 in med., an irritant substance 

 which, applied to the skin, gives 

 rise to heat, redness, etc., as if 

 there existed a slight local in- 

 flammation, as a mustard poultice, 

 useful in dissipated, slight local 

 pains. 



rubeola, n., rdb-e'dl'Ci (L. ruber, 

 red), applied to measles, now 

 restricted to an eruptive disease 

 presenting the characters of both. 



