50 



GLOSSARY. 



Dinosau'ria (Gr. 8eii>os, demos, ter- 

 rible ; (ravpos, sauros, a lizard). 

 Gigantic fossil animals of, the sau- 

 rian or lizard tribe. 



Dinothe'rium (Gr. Seii/os, deinos, 

 terrible ; Brjpiov, therion, a beast). 

 A gigantic fossil pachydermatous 

 animal. 



Dice'cia (Gr. Sis, dis, double ; OIKOS, 

 oi'kos, a house). A Linnjean class 

 of plants, having male flowers on 

 one plant, and female on another. 



Diop'tric (Gr. Sia, dia, through ; 

 OTTTOjuai, op'tomai, I see). Afford- 

 ing a medium for the sight : re- 

 lating to the science of refracted 

 light. 



Diop'trics (Gr. Sia, dia, through ; 

 oTTTo/jLai, op'tomai, I see). The part 

 of optics which describes the phe- 

 nomena of the refraction of light. 



Diora'ma (Gr. Sia, dia, through ; 

 opaw, hora'o, I see). An apparatus 

 in which a picture is exhibited 

 through a large aperture, partly by 

 reflected, and partly by transmitted 

 light. 



Dip. The angle which the magnetic 

 needle, freely poised, makes with 

 the plane of the horizon ; the in- 

 clination of a geological stratum or 

 bed to the horizon. 



Dipet'alous (Gr. Sis, dis, double ; 

 TreraAoj/, pet'alon, a petal). Having 

 two petals. 



Diphthe'ria (Gr. SupQepa, diph'thera, 

 leather). A disease characterised 

 by the formation of a leathery mem- 

 brane in the throat and fauces. 



Diphtheritic (Gr. SupQepa, diph'- 

 thera, leather). Tough, like leather ; 

 attended with the formation of a 

 leathery membrane. 



DiphyTlous (Gr. Sis, dis, double ; 

 <t>v\\ov, phul'lon, a leaf). Having 

 two leaves. 



Diphy'odonts (Gr. Sis, dis, double ; 

 (pvca, phuo, I produce ; oSous, 

 odous, a tooth). Animals which 

 produce two sets of teeth in suc- 

 cession. 



Dip'loe'(Gr. 5nr\ovs, dip' lows, double). 

 The network of bone-tissue which 

 rills up the interval between the 

 two compact plates in the bones of 



the skull ; in botany, the cellular 

 substance of a leaf. 



Diplo'ma (Gr. SITTAOW, dip' loo, I 

 double). Originally, a folded letter 

 or writing ; now applied to a letter 

 or writing conferring some power, 

 privilege, or dignity. 



Diplo'pia (Gr. SnrAous, dip'lous, 

 double; birTOfj.ai, op'tomai, I see). 

 Double vision ; a state in which 

 objects are seen double, from a dis- 

 turbance of the combined action of 

 the eyes. 



Diplop'tera (Gr. SITTAOUS, dip'lous, 

 double ; Trrepov, pter'on, a wing). 

 A family of hymenopterous or mem- 

 brane-winged insects, having the 

 fore-wings folded longitudinally, as 

 the wasp. 



Dip'terous (Gr. Sis, dis, twice; irrepov, 

 pter'on, a wing. Having two wings, 

 as certain insects : in botany, ap- 

 plied to seeds which have the 

 margin prolonged in the form of 

 wings. 



Dipteryg'ian (Gr. Sis, dis, twice ; 

 TTTcpvyio^pteru'gioii, a flu). Having 

 two fins. 



Dip'tote (Gr. Sis, dis, double ; TTITTTW, 

 pipto, 1 fall). A noun having two 

 cases only. 



Disc. See Disk. 



Disc'oid (Gr. SKT/COS, diskos, a quoit ; 

 eiSos, eidos, form). Shaped like a 

 disk or quoit. 



Discord (Lat. dis, separate ; cor, the 

 heart). Disagreement ; in music, 

 the mixed sound of notes, the vibra- 

 tions producing which are not in a 

 simple ratio to each other. 



Discord' ant (Lat. dis, apart ; cor, the 

 heart). Disagreeing ; in geology, 

 applied to strata deposited horizon- 

 tally on other strata which have 

 been thrown into an oblique di- 

 rection by disturbing causes. 



Disep'alous (Gr. Sis, dis, double ; 

 sepal). Having two sepals. 



Disinfect (Lat. dis, from ; infect). 

 To purify from infection. 



Disintegrate (Lat. dis, from ; in'teger, 

 entire). To break up into integrant 

 parts, not by chemical action. 



Disjunc'tive(Lat. dis, separate ;jungo, 

 I join). Separating ; in grammar, 



