110 



GLOSSARY. 



ceeding from them through a dense 

 stratum of air falling on the surface 

 of a rarer stratum, and being, 

 under certain conditions, reflected 

 downwards. 



Mi'tral (Lat. mi'tra, a head-dress, or 

 mitre). Resembling a mitre ; ap- 

 plied to the valve at the orifice of 

 the left ventricle of the heart. 



Mi' triform (Lat. mi'tra, a mitre ; 

 forma, shape). Shaped like a 

 mitre. 



Mnemonics (Gr. /nvaoncu, mna'omai, 

 I remember). The art of assisting 

 the memory. 



Mobility (Lat. mo'bilis, moveable). 

 Capability of being moved. 



Mo'dal (Lat. mo'dus, manner). Re- 

 lating to manner or form ; in logic, 

 applied to propositions which show 

 the manner in which the predicate 

 is connected with the subject. 



Mod'ule (Lat. mod'ulus, a measure). 

 A model : in architecture, a mea- 

 sure taken to regulate the propor- 

 tions of an edifice; generally the 

 semi-diameter of the column at the 

 bottom of the shaft. 



Mo'lar(Lat. mo'la, a mill). Grinding; 

 applied to the large double teeth 

 by which the food is ground. 



Molec'ular (Mol'ecule). Consisting 

 of or relating to molecules. 



Molec'ular Attraction. That form 

 of attraction which operates on the 

 molecules or particles of a body. 



Molec'ular Forces. The attractive 

 and repulsive forces existing be- 

 tween the molecules of a body. 



Mol'ecules (Lat. mo'les, a mass; ule, 

 denoting smallness). A very mi- 

 nute particle of a mass. 



Mollifies (Lat. softness). In medi- 

 cine, a diseased softening of various 

 parts. 



Mollus'ca (Lat. mol'lis, soft). A di- 

 vision of invertebrate animals, so 

 called from the softness of their 

 bodies ; comprising cephalopods, 

 pteropods, gasteropods, acephala, 

 and brachiopods. 



Mollus'coid (MolluJca; Gr. et'Sos, 

 eidos, form). A subdivision of 

 the molluscous division, including 

 tunicata and bryozoaria. 



Momen'tnm (Lat. moveo, I move). 

 The force which a moving mass of 

 matter exercises against an object 

 with which it comes into contact, 

 being the product of its quantity 

 of matter and its velocity. 



Mon- or Mon'o- (Gr. fj.ovos, mon'os, 

 alone). A prefix in compound 

 words signifying single. 



Mon'ad (Gr. f^ovos, mon'os, single). 

 An ultimate atom ; a name given 

 to the smallest of visible animal- 

 cules. 



Monadel'phia (Gr. IJLOVOS, mon'os, 

 single ; aSeA^os, adelphos, a bro- 

 ther). A class of plants in the 

 Linnean system, in which all the 

 stamens are united in a cylindrical 

 body, through the midst of which 

 the pistil passes. 



Monan'dria (Gr. fj.ovos, mon'os, 

 single ; O.VTIP, aner, a man). A 

 class of plants in the Linugean sys- 

 tem, having only one stamen. 



Mongolian (Mongol). A term ap- 

 plied to a class of mankind having 

 the Mongols and Chinese as the 

 type. 



Monil'iform (Lat. moni'le, a necklace; 

 for'ma, shape). Like a necklace ; 

 beaded. 



Monoba'sic (Gr. ft.ovos, mon'os, single; 

 jScwm, ba'sis, a foundation). Having 

 a single atom of base. 



Monocar'pous (Gr. povos, mon'os, 

 single ; Kapiros, kar'pos, fruit). 

 Bearing a single fruit. 



Monochlamyd'eous(Gr. /JLOVOS, mon'os, 

 single ; xAa/uuy, chlamus, a tunic). 

 Applied to flowers having a single 

 envelope. 



Monocli'nate (Gr. povos, mon'os, 

 single ; K\IVQ), Jclinu, I bend). 

 Having one of the axes turned 

 obliquely ; applied in mineralogy 

 to certain crystals. 



Mon'ochord (Gr.^oi'oy, mon'os, single ; 

 Xopfy, chorde, a chord or string). 

 A musical instrument or apparatus 

 of one string, used for the purpose 

 of determining the rates of vibration 

 of musical notes. 



Monochromatic (Gr. /novas, mon'os, 

 single ; XP W M > chroma, colour). 

 Of one colour only. 



