GLOSSARY. 



103 



of several magnets with all their 

 poles similarly disposed. 



Magnetic Equa'tor. A line on the 

 earth traced through the points at 

 which the magnetic needle rests 

 horizontal. 



Magnetic Meridian. A line on the 

 earth's surface, bearing the same 

 analogy to the magnetic equator as 

 the terrestrial meridian to the ter- 

 restrial equator. 



Magnetic Poles. The two regions of 

 attraction separated by the equator 

 of a magnet. 



Mag'netism (Gr. IMJVTJS, magnes, a 

 magnet). The science which de- 

 scribes the properties of the magnet; 

 the property which is possessed by 

 the magnet. 



Mag'netise (Gr. [tayvris, magnes, a 

 magnet). To impart magnetic pro- 

 perties : to become magnetic. 



Mag'neto-electriclty (Magnet ; elec- 

 tricity). The phenomena of elec- 

 tricity called into existence by 

 magnetism. 



Magnetom'eter (Magnet; Gr./xerpor, 

 metron, a measure). A magnetised 

 bar of steel for the purpose of de- 

 termining the absolute amount of 

 magnetic declination, or the inten- 

 sities of terrestrial magnetism in 

 horizontal or vertical directions. 



Magnitude (Lat. magnus, large). 

 Size. Linear magnitude is length or 

 distance. Superficial magnitude or 

 area is the space included in length 

 and breadth expressed in squares. 

 Solid magnitude or volume is the 

 bulk expressed by the length, 

 breadth, and thickness of a body, 

 or the space which it fills, expressed 

 in cubes. Apparent magnitude, in 

 optics, is the size of the picture 

 formed on the retina, as measured 

 by the angle formed between the 

 object seen and the centre of the eye. 



Mal'acMte (Gr. paAaxr), mal'ache, 

 mallows ; from its appearance). A 

 mineral, consisting of green car- 

 bonate of copper. 



Mal'aco- (Gr. fj.a.\a.Kos, mal'akos, 

 soft). A prefix in compound words, 

 signifying softness. 



Malacol'ogy (Gr. /uoAa/eos, mal'akos, 



soft; \oyos, logos, a description). 

 The description of molluscous or 

 soft-bodied animals. 



Malacopteryglan (Gr. na\a.Kos, 

 mal'akos, soft ; irrepvyiov, ptervf- 

 gion, a little wing, or fin). Having 

 soft fins ; applied to an order of 

 fishes, of which the rays of the fins 

 are cartilaginous. 



Malacopterygli abdominales. Abdo- 

 minal malacopterygians ; soft-finned 

 fishes, with the ventral fins situ- 

 ated under the abdomen behind the 

 pectoral fins. 



Malacopterygli subbranchia'ti. Sub- 

 branchiate malacopterygians ; soft- 

 finned fishes, with the ventral fins 

 placed under the pectorals. 



Malacopterygli ap'odes. Apodal 01 

 footless malacopterygians ; soft- 

 finned fishes, without ventral fins, 

 the homologues of feet. 



Malacos'teon (Gr. /taAa/coy, mal'akos, 

 soft ; oa-reoif, os'teon, a bone). Soft- 

 ness of bones ; the disease other- 

 wise called mollities ossium. 



Malacos'tracous (Gr. fj.a\aKos, mal'a- 

 Tcos, soft ; 6<rTpaitoi>, osftrakon, a 

 shell). A section of Crustacea, of 

 which the shell is generally solid ; 

 named from the relative softness of 

 the shell as compared with that of 

 mollusca. 



Malar (Lat. mala, the cheek). Be- 

 longing to the cheek. 



Mala'ria (Italian, mal, bad ; a'ria, 

 air). Bad air ; an exhalation, as 

 from marshes, tending to produce 



Mala'rial (Mala'ria). Produced by 

 malaria. 



Mala'rious (Mala'ria). Containing 

 or of the nature of malaria. 



Ma'late (Lat. malum, an apple). A 

 compound of malic acid, or acid of 

 apples, with a base. 



Malic (Lat. malum, an apple). Be- 

 longing to apples : applied to an 

 organic acid, found principally in 

 apples. 



Malleability (Lat. mal'leus, a ham- 

 mer). The property of being re- 

 duced to thin plates or leaves by 

 hammering or rolling. 



Malleable (Lat. mal'leus, a hammer). 



