DIMIDIATE 



103 



DIP 



Dimidiate, (di-mid'i-ut). [L. demidius, half.] 

 =Halved. 



Dimocarpus. A plant having edible pulpy 

 fruit, with leathery coat, found in China. 

 D. litchi = Litchi. D. longan = Longan. 

 Included in Euphoria, q.v. 



Dimorphism, (di-morfizm). [Gk. dis, twice : 

 morpkc, form.] 1. Crystallization of the 

 same substance in two different forms, as 

 in sulphur, carbon, palladium. 2.=Hetero- 

 Btylism. 3. Two forms of flowers, one brighter 

 than the other. 4. Generally, any double 

 form. 



Dimorphodon, ( di-morf o-don ). [Gk. dis, 

 twice; morphe, form; odous, tooth.] An. 

 extinct reptile, belonging to Pterosauria, 

 having both large and small teeth. 



Dimyaria, (dl-ml-a'ri-a). [Gk. dis, twice; 

 myon, muscle.] Acephalous mollusca: 

 having two impressions of muscles in 

 each valve, having two adductor muscles. 

 A sub-division of Lamellibranchiata. 



Dinaphthyl, (di-naf'thil). [Di and Naphthyl, 

 q.v.] (CjoHyJa: the molecular form of 

 naphthyl, q.v. 



Dinas bricks, (din'as). [D. in S. Wales.] 

 Fire-bricks made of a silicious earth found 

 near Dinas. 



Dingo, (din'go)=Australian dog=Canis dingo. 



Dinoceras, (di-nos'e-ras). [Gk. ileinos, terrible; 

 keras, horn.] The type of Dinocerata, q.v. 



Dinocerata, (di-no-ser-a'ta). [Dinoceras, the 

 typical genus. ] Ruminant quadrupeds 

 known only by fossil remains found ia 

 American Eocene rocks. 



Dinophis, (di-no'fis). [Gk. deinos, terrible; 

 opUs, snake.] A snake, known only by 

 fossil remains, found in Tertiary rocks. 



Dinoponera. D. grandis : a stinging ant of 

 Brazil, lj in. long. 



Dinornis, (di-nor'nis). [Gk. deinos, terrible ; 

 onus, bird.] A large struthious bird of 

 New Zealand, recently extinct. 



Dinosauria, ( dl-no-sav/ri-a ). [Gk. deinos, 

 terrible; saura, lizard.] Extinct reptiles, 

 including the Iguanodon and Megalosaurus, 

 of which some approximate to birds in 

 structure: so highly organised as to approxi- 

 mate to Mammalia. Form a link between, 

 reptiles and birds. 



Dinotheres, ( di-no-the'rez ). [ Dinotherium, 

 5.v.]=Dinotheria : plural of Dinotherium, 

 q.v. 



Dinotherium, (dl-no-the'ri-um). [Gk. deinos, 

 terrible ; therion, 

 beast.] An extinct 

 elephant - like ani- 

 mal, remains of 

 which are found in 

 Miocene strata. 



Diodon, ( di'o-don ). 

 [Gk. dis, twice; 

 odoiis, tooth.]= 

 Sun- fish: a fish 

 belonging to Te- Dinotherium. 



leostei, named from the sharp edge of its 

 jaws, has a very distensible skin, which it 

 inflates for floating. 



Diceceous, (di-e'si-us). [Gk. dis, double; oikos, 



house. ] Plants having male and female 

 flowers on different individuals; usually 

 have nectaries, and are impregnated by in- 

 sects. 



Dicecia, (di-e'si-a). [Gk. dis, double ; oikos, 

 house.] A class in the Linnaean system of 

 botany, including dioecious plants. 



Dionsea, (di-6-n5'a). [Dione, q.v.] A plant 

 belonging to Droseracese. D. muscipula= 

 Catchfly=Venu8's fly-trap. 



Dione, (di-6'ne). [Classical.] A star. 



Dionysian period, (di-o-nish'i-an). [Dionysius, 

 q.v.] = 19x28=. 532 years = Lunar cycle x 

 Solar cycle : at the end of which the changes 

 of the moon take place on the same day of 

 the week and of the month. 



Dionysius, ( di-o-nish'i-us ). [Classical.] A 

 crater in the moon. 



Dioplodon, (di-op'lo-don). [Gk. dis, twice; 

 hoplon, weapon ; odous, tooth.] A dolphin, 

 known only by fossil remains, chiefly teeth, 

 found in Miocene rocks. 



Diopside, (di-op'sid). [Gk. dia, through; 

 opsis, sight.] A light green transparent 

 variety of pyroxene, chiefly silicate of mag- 

 nesium and calcium. 



Dioptase, (dl-op'tas). [Gk. diopteuo, I look 

 through.]=Emerald copper ; a silicate of 

 copper. 



Dioptric, (dl-op'trik). [Gk. dia, through; 

 opto, I see.] D. telescope-^ Refracting tele- 

 scope, v. Telescope. D. lighthouse: one in 

 which the light is refracted. 



Dioptrics, ( di-op'triks ). [Dioptric, q.v.]= 

 Anaclastics: the science of refraction of light. 



Diorite, (di'or-it). A variety of greenstone; 

 a compound of hornblende and felspar. 



Dioscorea, (di-os-ko're-a). [Dioscorides.] D. 

 atoto=Winged-yam. D. satira Yam. 



Dioscpreaceae, ( di-os-ko-re-a'se-e ) = Yams : 

 tropical twining shrubs, with small flowers 

 and sometimes edible tubers, belonging to 

 Dictyogens. 



Diospyros, (di-os'pi-ros). [Gk. dios, divine; 

 pyros, wheat or food.] A genus of plants, 

 belonging to Ebenacese, chiefly tropical 

 trees. D. Ebenus ; ebony. 



Diostea, (di-os'te-a). [Gk. din, double ; osteon, 

 bone.] A new genus of Verbenaceaa from 

 Chili. 



Diotis, (di-o'tis). [Gk. dis, two; out, ear.J 

 = Cotton-weed : an herb, belonging to 

 Asteraceaa, named from the lobes of tha 

 corolla being ear-shaped. 



Dioxides, (dl-oks'idz). [Di and Oxide, q.v.] 

 =Binoxides=Deutoxides : compounds con- 

 taining two equivalents of oxygen to one of 

 another element, as SnC^. 



Dip, (dip). D. of astronomical observation: 

 the correction required when the altitude of 

 a celestial object is observed from a height h, 

 such as a mountains -9752V ^ in minutes to 

 be subtracted. D. of magnetic needle: the 

 vertical angle which a freely suspended 

 needle makes with the horizon. D. of strata: 

 the inclination of strata to the horizon ; re- 

 sembling the slope of a house roof. D. circle; 

 an instrument for measuring the magnetic 

 dip. 



