GLOSSARY. 



105 



Mas'ticate (Gr. ^OOTOS, mastos, the 

 jaws or mouth). To chew. 



Masti'tis (Gr. /iatrros, mastos, the 

 breast ; t'ta's, denoting inflamma- 

 tion). Inflammation of the breast. 



Mas'todon (Gr. (JLCUTTOS, mastos, a 

 nipple ; oSovs, odous, a tooth. ) A 

 fossil animal of the elephant kind, 

 so called from the nipple-like pro- 

 minences on its teeth. 



Mastodyn'ia (Gr. fj-atrros, mastos, the 

 breast ; 68wi], od'une, pain). 

 Pain of the breast. 



Mas'toid (Gr. /uaoToy, mastos, a 

 nipple ; ei'Sos, eidos, shape). Re- 

 sembling a nipple. 



Mater (Lat. a mother). A name 

 given to two of the membranes 

 covering the brain, because for- 

 merly supposed to be the source of 

 all the other membranes. 



Mate'ria Med'ica (Lat. medical ma- 

 terial). The collective name for the 

 substances used in medicine ; the 

 science which describes these sub- 

 stances, their properties, modes of 

 preparation, &c. 



Mathematics (Gr. fj.a0i]/j.a, matJiema, 

 learning; from fj.av9av.ca, man'tkano, 

 I learn). The science which treats 

 of whatever can be measured or 

 numbered. Pure mathematics 

 considers quantity and number 

 without reference to matter. 

 Mixed mathematics treats of mag- 

 nitude in connection with material 

 bodies. 



Matrix (Lat. mater, a mother). The 

 cavity or substance in which any- 

 thing is formed or imbedded. A 

 mould : as the matrix of a type, &c 



Maturate (Lat. matu'ms, ripe). To 

 ripen. 



Maxilla (Lat. a jaw). A jaw ; the 

 lower pairs of horizontal jaws in 

 invertebrate animals. 



Maxillary (Lat. maxil'la, a jaw). 

 Belonging to the jaws. 



MaxiTliped (Lat. maxil'la, a jaw; 

 pes, a foot). A jaw-foot ; applied 

 to the foot-like organs covering the 

 mouth in Crustacea. 



Max'imum (Lat. greatest). The 

 greatest quantity or degree attain- 

 able. 



Mean (Fr. moyen, from Lat. me'dius, 

 middle). Having an intermediate 

 or average value between two or 

 more quantities. 



Mea'tus (Lat. meo, I pass). A pas- 



Mechan'ics (Gr. n^x av ^ mechane, 

 an artificial contrivance). The 

 science which investigates the ac- 

 tion of bodies on one another, 

 either directly or by means of ma- 

 chinery. 



Mec'onate (Gr. fjuqntav, mekon, a 

 poppy). A salt of meconic acid 

 with a base. 



Mecon'ic (Gr, /JL-TIKUV, mekon, a 

 poppy). Belonging to the poppy ; 

 applied to an acid found in opium. 



Mediae'val (Lat. me'dius, middle ; 

 cevum, an age). Belonging to the 

 middle ages. 



Me'dian Plane (Lat. me'dius, middle). 

 A plane or flat surface supposed to 

 pass down through a body from 

 before backwards, so as to leave 

 equal parts on both sides. 



Mediasti'mun. The partition formed 

 by the meeting of the pleurae, divi- 

 ding the chest into two lateral 

 parts. 



Medical Jurispru'dence. The science 

 which treats of subjects in which 

 both law and medicine are applied. 



Medicate (Lat. med'icus, a physi- 

 cian). To impregnate with medi- 

 cinal substances. 



Medicine (Lat. med'eor, I cure ; from 

 Gr. fj.e8ojj.ou, med'omai, I attend 

 to). The science of relieving, 

 curing, or preventing diseases ; 

 any substance used with these 

 objects. 



Medie'val. See Mediaeval. 



Me'dium (Lat. me'dius, the middle). 

 The space, substance, or matter in 

 which bodies exist, or in which 

 they move; the agent through 

 which a cause or power acts in 

 producing its effect. 



Medulla (Lat.). Marrow; in botany, 

 the pith of plants. 



Medulla Oblonga'ta (Lat.). The 

 lengthened or prolonged marrow ; 

 the continuation of the spinal cord 

 within the skull. 



