Diffuse 



A DICTIONARY 



Diplanetism 



DIFFUSE', spreading widely, 

 loosely, aud irregularly. Com- 

 pare Effuse. 



DIFFUSION, the spontaneous 

 mixture of one liquid with 

 another, or of any dissolved or 

 finely divided substance or any 

 liquid through a liquid or solid. 

 Compare Osmose. 



DfG'AMOUS, see Diclinous. 



DIG'ENOtJS, containing both 

 sexes or produced sexually. 

 (Rare.) 



DIGITATE, having several parts 

 radiating from one point, or 

 nearly so, somewhat like the 

 lingers on one's hand. Ap- 

 plied in grasses where several 

 spikes radiate from nearly the 

 same point, ' as in crab-grass 

 (Sanguinaria). In leaves it is 

 the same as Palmately-com- 

 pound. Compare Pedate. 



Di6'f TATE PIN'NATE, having a 

 digitate leaf with pinnate leaf- 

 lets. 



D!G iTATE VEINED, see Pal- 



MATELY- VEINED. 



DlG'lTIF6RM, see Digitate. 

 DlG'iTlNERVED, see Pal- 



M A.TEL Y- VEI NED. 



DlG'ONOUS, two-angled, as the 



stems of some cacti. 

 DIGYN'IAN, see Digynous. 

 Dl6'YN0US, having two pistils, 



styles, or stigmas in a flower. 



Generally the same as Dicarpel- 



lary. 



DiLAMiNA'TION, see Cnoiusis. 



DILAT'ED, expanded or widened. 



DlM'EROTJS, having the parts in 

 twos, as two sepals, two petals, 

 two stamens, aud two pistils in 

 a flower. 



DiMlD'lATE, halved, or appear- 

 ing as if one side or one half 

 were wanting, as a leaf which 



is developed on one side of the 

 midrib only. Compare Ob- 

 lique. Applied also to the 

 calyptra of mosses when di- 

 vided along one side. The 

 term is also applied to bodies 

 which are actually halved or 

 divided into two parts, and to 

 those in which one side differs 

 from the other in function. 



DIMORPHOUS, existing under 

 two forms, as two forms of 

 leaves, sterile and fertile, on 

 one plant in ferns. Applied 

 especially to heterogenous 

 plants having two forms of 

 flowers ou separate individuals, 

 one with long stamens and 

 short styles and another with 

 short stamens and long styles. 

 Compare Tiumokphous. 



Dlffi'glAN, see Dkecious. 



DIOZ'CIOUS, having stamens and 

 pistils in separate flowers upon 

 different individuals. 



Dlffi'CIOUSLt POLYGAMOUS, 

 when some of the flowers in 

 dioecious plants are perfect. 

 Each set of plants may have 

 perfect as well as unisexual 

 flowers, or one set may have 

 all perfect flowers and the 

 other all staminate or all pistil- 

 late; polygamo-dicecious. 



DI'dSMOSE, see Osmose. 



DIPET ALOUS, having two petals 

 in a flower. 



DlPHYL'LOUS, two-leaved. Hav- 

 ing two leaves, leaflets, or leaf- 

 like parts. Sometimes used for 

 Disepalous. 



DlPlAN'flTlSM, the property of 

 being twice active with an in- 

 tervening period of rest. It 

 occurs in the zoospores of cer- 

 tain genera of Saprolegnieae in 

 which the zoospores escape 

 without cilia from the spo- 

 rangium aud come to rest in a 



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