156 



GLOSSARY. 



the form of a fine network ; it is 

 the part of the nervous system 

 which receives the first perception 

 of the rays of light. 



Eetinac'ulum (Lat. a band). In 

 botany, the viscid matter by which 

 the pollen-masses in orchids ad- 

 here to a prolongation of the 

 anther. 



Eetini'tis (Lat. retina ; i'tis, denoting 

 inflammation). Inflammation of 

 the retina. 



Retort (Lat. re; tor'queo, I twist or 

 bend). In chemistry, a globular 

 vessel with a long neck employed 

 in distillations. 



Ee'tro- (Lat. backwards). A prepo- 

 sition used in compound words, 

 signifying backward or back. 



Eetroce'dent (Lat. re'tro, backwards; 

 ce'do, I go). In medicine, applied 

 to diseases which move from one 

 part of the body to another, as 

 gout. 



Eetroces'sion (Lat. re'tro ; ce'do, I go). 

 A moving backwards. 



Ee'troflex (Lat. re'tro, backwards ; 

 flecto, I bend). Bent backwards ; 

 in botany, bent this way and that. 



Ee'trofract (Lat. retro, backwards ; 

 fraii! go, I break). Bent back- 

 wards as if broken. 



Ee'trograde (Lat. re'tro, backwards ; 

 grad'ior, I step). Moving back- 

 wards ; in astronomy, apparently 

 moving in the contrary direction to 

 the order of the signs of the zo- 

 diac, in which the sun appears to 

 move. 



Eetrogres'sion (Lat. re'tro, back- 

 wards; grad'ior, I step). Amoving 

 backwards ; in astronomy, the 

 change of position undergone by 

 the moon's nodes, in a direction 

 contrary to the motion of the sun. 



Eetropul'sive (Lat. re'tro, backwards ; 

 pel'lo, I drive). Driving back. 



Ee'trorse (Lat. re'tro, backwards ; 

 versus, turned). Turned backwards. 



Eetrover'sion (Lat. re'tro, backwards ; 

 ver'to, I turn). A turning back- 

 wards. 



Ee'trovert (Lat. re'tro, backwards; 

 ver'to, I turn). To turn back. 



Ee'tuse (Lat. re; tundo, I bruise). 



Having a broad, blunt, and slightly 

 depressed apex. 



Eever'berate (Lat. re; ver'bero, I 

 beat). To beat back or return. 



Eeverbera'tion (Lat. re; ver'bero, I 

 beat). A beating back. 



EeverTaeratory (Lat. re; ver'bero, I 

 beat). Applied to a furnace or 

 oven, in which a crucible or other 

 object is heated by flame or hot air 

 reverberated or beaten back from 

 the roof. 



Revivification (Lat. re ; vi'vus, 

 alive ; fac'io, I make). Restora- 

 tion of life. 



Ee'volute Lat. re; vol'vo, I roll). 

 Rolled backwards. 



Eevolu'tion (Lat. re; vol'vo, I roll). 

 Rotation ; the circular movement 

 of a body round a centre. 



Ehachitis (Gr. faxis, rhactiis, the 

 spine). See Rachi'tis. 



Eheom'eter (Gr. peos, rhe'os, a cur- 

 rent ; lUerpoz/, met'ron, a measure). 

 An apparatus for measuring the 

 intensity of a galvanic current. 



Eheom'etry (Gr. peos, rhe'os, a cur- 

 rent ; jj-^rpov, met'ron, a measure). 

 The differential and integral cal- 

 culus; the method of determining 

 the force of galvanic currents. 



Eheomo'tor (Gr. peos, rhe'os, a cur- 

 rent ; Lat. mov'eo, I move). Any 

 apparatus by which an electrical or 

 galvanic current is originated. 



Ehe'oscope (Gr. peos, rhe'os, a cur- 

 rent ; fficoireoo, skop'eo, I view). 

 An apparatus for ascertaining the 

 pressure of a galvanic current. 



Ehe'ostat (Gr. peos, rhe'os, a current; 

 la-TTjfJLt, histemi, I make to stand). 

 An apparatus for enabling a gal- 

 vanic needle to be kept at the same 

 point during an experiment. 



Ehe'otome (Gr. peos, rhe'os, a cur- 

 rent ; rffj-vu, tem'no, I cut). An 

 instrument for periodically inter- 

 rupting an electric current. 



Bhe'otrope (Gr. peos, rhe'os, a cur- 

 rent ; rpeTTw, trep'o, I turn). An 

 instrument for reversing the direc- 

 tion of a voltaic current. 



Ehet'oric (Gr. pew, rhe'5, I flow). 

 The art of speaking with propriety, 

 elegance, and force. 



