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GLOSSARY. 



Recurrent (Lat. re, back ; curro, I 

 run). Returning ; in anatomy, 

 applied to a branch of the pueumo- 

 gastric nerve, which is given off in 

 the upper part of the chest and 

 runs up along the trachea and 

 larynx. 



Recurring (Lat. re, back ; curro, I 

 run). Returning ; in arithmetic, 

 applied to decimals in which the 

 figures are continually repeated in 

 the same order. 



Recur 7 vate (Lat. re, back ; curvus, 

 crooked). Bent backwards. 



Beduc'tion (Lat. re, back ; duco, I 

 bring). In chemistry, the bring- 

 ing back a metal to its simple state 

 from a compound ; in surgery, the 

 restoiation to its place of a dislo- 

 cated bone or other part. 



Eedu'plicate (Lat. re, back ; duplex, 

 double). In botany, applied to a 

 form of aestivation in which the 

 edges of the sepals or petals are 

 turned downwards. 



Reflecting- Goniom'eter. An instru- 

 ment for measuring the angles of 

 crystals by means of rays of light 

 reflected from their surface. 



Reflec'tion (Lat. re, back ; flecto, I 

 bend). The act of throwing back; 

 in natural philosophy, applied to 

 the motion of light, heat, or sound, 

 by which either of them rebounds 

 from a body against which it has 

 struck, making an equal angle 

 with that at which it has fallen on 

 the body. 



Ueflec'tor (Lat. re, back ; flecto, I 

 bend). That which reflects or 

 bends back ; a surface of polished 

 metal or other suitable material 

 for the purpose of throwing back 

 rays of light, heat, or sound, in 

 any required direction. 



Re'flex (Lat. re, back; flecto, I bend). 

 Bent back ; in physiology, applied 

 to a class of actions in which an 

 impression is carried by a nerve to 

 the nervous centre, whence a nerve 

 of motion conveys the impulse of 

 motion to certain muscles, which 

 thus act without the will of the 

 individual. 



Reflex' (Lat. re, back; flecto, I bend). 



In painting, the illumination of one 

 body by light reflected from another 

 body in the same piece. 



Re'flux (Lat. re, back ;flu'o, I flow). 

 A flowing back. 



Refrac'tion (Lat. re, back ; fran'go, 

 I break). The change in direction 

 which a moving body, especially 

 light, undergoes in passing from 

 any medium into one of different 

 density. 



Refrac'tive (Lat. re, back ; fran'go, 

 I break). Allowing or favouring 

 refraction. 



Refrac'tory (Lat. re, against ; fran'go, 

 I break). In chemistry, applied to 

 substances which resist the action 

 of heat or other agencies. 



Refrangibil'ity (Lat. re, back ; fran'go, 

 I break). The disposition of rays 

 of light to be turned from their 

 direct course in passing from one 

 medium to another ; especially the 

 degree of that disposition possessed 

 by the coloured rays. 



Refrig'erant (Lat. re, back ; fri'gus, 

 cold). Abating heat ; cooling. 



Refrig-era'tion (Lat. re, back ; fri'gus, 

 cold) . Cooling ; the removal of heat. 



Regeneration (Lat. re, again ; gen 1 era, 

 I produce). In physiology, the re- 

 newal of a portion of lost or removed 

 tissue by the formation of a new 

 portion of tissue of the same kind. 



Reg'imen (Lat. reg'o, I rule or 

 govern). In medicine, regulation 

 of diet and habit ; in grammar, 

 the regulation of the dependence of 

 words on each other. 



Register Pyrom'eter. An instru- 

 ment for measuring high tempera- 

 tures by the linear expansion of 

 bars of metal. 



Register Thermom'eter. A ther- 

 mometer which records ita own 

 indications. 



Regression (Lat. re, back ; grad'ior, 

 I step). A moving backwards. 



Reg'ular (Lat. reg'ula, a rule). Ac- 

 cording to rule ; in geometry, ap- 

 plied to bodies the sides and angles 

 of which are equal. 



Relaxa'tion (Lat. re, back ; laa/o, I 

 loosen). A loosening, or letting 

 loose. 



