GLOSSARY. 



49 



two long tusks in sockets, curved J 

 downwards. 



Didac'tyle (Gr. Sis, dis, double ; 

 SO.KTV\OS, dak'tulos, a finger). 

 Having two fingers or toes. 



Didel'phic (Gr. Sis, dis, double ; 

 Se\<pvs, delphus, the womb). A 

 term applied to a division of mam- 

 mals of which the young are born 

 prematurely, including the mar- 

 supiate and monotrematous ani- 

 mals. 



Didynam'ia (Gr. Sis, dis, double; 

 Swa/jLts, du'namis, power). A 

 Linneean class of plants, having 

 four stamens, two long and two 

 short. 



Dielec'tric (Gr. Sia, dia, between ; 

 electric), A bad conductor of 

 electricity. 



Dietetic (Gr. Siaira, diai'ta, food or 

 diet). Relating to food or diet. 



Differencial (Lat. dis, apart ; fero, I 

 bear). Pointing out a distinction 

 or difference : applied to a ther- 

 mometer which shows the difference 

 in the temperature of two portions | 

 of air ; also to an infinitely small 

 quantity in arithmetic or algebra. 



Differen'tiate (Lat. differen'tia, a 

 difference). To establish a distinc- 

 tion or difference. 



Diffrac'tion (Lat. dis, apart ; frango, 

 I break). The turning aside of 

 rays of light from their straight 

 course, when made to pass by the 

 boundaries of an opaque body. 



Diffu'sible (Lat. dis, apart ; fundo, I 

 pour). Capable of being poured or 

 spread in all directions. 



Diffusion (Lat. dis, apart ; fundo, I 

 pour). A pouring or spreading in 

 all directions. 



Diffusion of Gases. The process by 

 which gases mix with each other. 



Digas'tric (Gr. Sis, dis, double ; 

 -yaa-rrjp, (faster, a belly). Having 

 a double belly. 



Diges'tion (Lat. di, apart ; gero, I 

 bear or carry). A division or sepa- 

 ration ; the process by which the 

 nutritive parts of food are separated 

 and rendered available for nutrition. 



Diges'tive (Lat. di'gero, I digest). Re- 

 lating to or promoting digestion. 



Digit (Lat. dic/itus, a finger). A 

 finger's breadth ; the twelfth part 

 of the diameter of the sun or moon, 

 used in measuring the extent of 

 eclipses ; in arithmetic, a single 

 figure. 



Digitate (Lat. dig'itus, a finger). 

 Arranged like fingers. 



Digltigrade (Lat. dig'itus, a finger or 

 toe ; yradior, I step). Walking on 

 the toes, as the lion, cat, &c. 



Digynla (Gr. Sty, dis, twice ; ywn, 

 gune, a female). A Linnsean order 

 of plants having two pistils. 



Dihed'ral (Gr. Sis, dis, double ; e5pc, 

 hedra, a seat or face). Having 

 two sides. 



Dilata'tion (Lat. dis, apart ; latus, 

 wide). A widening in all direc- 

 tions. 



Diluent (Lat. di'luo, I wash away). 

 Making thin, or more liquid ; 

 weakening in intensity. 



Dilu'te (Lat. di'luo, I wash away). 

 Reduced in strength ; rendered 

 more liquid. 



Dilu'vial (Lat. dilu'vium, a deluge). 

 Relating to or produced by a deluge ; 

 in geology, applied to those deposits 

 which give indications of having 

 been carried from a distance by a 

 violent current of water. 



Dilu'vium (Lat. di'luo, I wash away). 

 In geology, a term applied to the 

 results of extraordinary or violent 

 agency of water. 



Di'merous (Gr. Sis, dis, double ; 

 ftepos, meros, a part). Having 

 parts arranged in twos. 



Dimidiate (Lat. dimict'ium, half), 

 Divided into two halves. 



Dimorphism (Gr. Sis, dis, double ; 

 juop<>?], morphe, form). The property 

 of assuming two forms under differ- 

 ent circumstances. 



Dimor'phous (Gr. Sis, dis, double ; 

 /j.op<f>ri, morphe, form). Having 

 tw.o forms. 



Dimy'ary (Gr. Sis, dis, double ; p.vs, 

 mus, a muscle). Applied to bivalve 

 shells which are closed by two 

 muscles. 



Dinor'nis (Gr. Seivos, deinos, terrible ; 

 opvis, ornis, a bird). A gigantic 

 extinct bird of New Zealand. 

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