Deviation 



Diaphragm 



Devia'tion, probable, Galton's term 

 for probable variation. 



Dew-leaves, leaves which slope up- 

 wards, so that dew is collected. 



dex'trad, an unusual modification of 

 DEXTRAL = DEXTRORSE (dextrou, the 

 right hand) ; Dextrin, a substance 

 produced during the transformation 

 of starch into sugar, said to be of 

 two forms : AcHROODEXTRiN and 

 AMYLODEXTRIN ; Dex'trinase, an 

 enzyme stated to be present in 

 diastase (Wysman); dex'trorse, dex- 

 tror'ms (from versus, turned to- 

 wards), towards the right hand ; 

 dex'tror'sum volu'bilis (Lat.), twin- 

 ing towards the right ; Dex'trose, 

 glucose, or fruit sugar, it turns the 

 plane of polarization to the right ; 

 cf. LEVULOSE ; dex'tro-ro'tatory, 

 turning towards the right. 



di-, dis-, in Greek compounds = two, 

 or double. 



Diache'nium (Si, two, + Achenium), or 

 Diake'nium = CREMOCARP. 



Diach'yma (5td, through ; xi'/xa, a liba- 

 tion), Link's term for MESOPHYLL. 



Diadel'phia (5t,two; dSe\06s,a brother), 

 a Linnean class having the stamens 

 in two bundles or brotherhoods ; 

 diadelph'ian, diadelph'ous, -us, -icus, 

 with two groups of stamens. 



diad'romous (Sid, through ; Spo/xos, 

 course), applied to a fan-shaped 

 venation, as in Gingko biloba, Linn, 

 diageotrop'ic (777, the earth ; rpoTros, 

 a tarn), a modified form of geotrop- 

 ism, the organs placing themselves 

 in a horizontal position, as though 

 opposing forces were neutralised ; 

 Diageot'ropism, the state just de- 

 scribed; Diagno'sis (yvucrts, wisdom), 

 a brief distinguishing character ; 

 diag'onal (yuvia, angle), a mean 

 between two forces, a compromise 

 of position ; <~ Plane, in a flower, 

 any vertical plane which is not 

 antero- posterior (front to back) or 

 lateral (side to side) ; ~ Position, 

 one intermediate between median 

 and lateral ; ~ Sym'metry, applied 

 to the valves of Diatoms when the 

 torsion amounts to 180 ; Di'agram 



(ypa/j,fj.ri, an outline), see FLORAL 

 DIAGRAM ; Diaheliot'ropism (77X105, 

 the sun ; rpowos, a turn), growth 

 more or less horizontal, under the 

 influence of light, as wben leaves 

 place themselves at right angles 

 to incident light ; adj., diaheliot- 

 rop'ic. 



dialycarp'ic (cuaXi'co, I disband ; /capiros, 

 fruit), having a fruit composed of 

 distinct carpels; Dialydes'my(5etr,u6s, 

 a band), the breaking up of a stele, 

 into separate bundles, each with 

 its own endodermis ; Dialypet'alae 

 (ireTa\oi>, a flower-leaf), Endlicher's 

 equivalent for the POLYPETALAE of 

 Jussieu ; dialypet'alous, poly- 

 petalous ; dialyphyll'ous (0uXXoi>, a 

 leaf), bearing separate leaves ; dia- 

 lysep'alous ( + SEPALTJM), bearing 

 separate sepals ; Dial'ysis, the 

 separation of parts normally in 

 one, especially parts of the same 

 whorl ; Dialyste'ly (arri\-q, a post), 

 a variation of POLYSTELY, in which 

 the separate steles remain for the 

 most part separate during their 

 longitudinal course. 



diamesog'amous (did, through, (jieaos, 

 middle, yd/xos, marriage), fertiliza- 

 tion by the means of some external 

 agent, as wind or insects ; Dia- 

 mesog'amy, the condition just de- 

 fined. 



Dian'dria (Sis, two, dviip, dvSpbs, a 

 man), a Linnean class with plants 

 of two stamens ; dian'drian, dian'- 

 drous, -rux, (diander), possessing 

 two stamens. 



diaph'anous, -us (Sid, through, <f>aivw, 

 I show), permitting the light to 

 shine through ; also written dio- 

 pn'anus J ; Diaph'ery (^epw, I bear), 

 the calycine synthesis of two 

 flowers (Morren) ; Di'apnragm 

 ((ppda-ffu, I enclose), a dividing mem- 

 brane or partition, as (1) the con- 

 striction in the neck of the nucule 

 in Chara, from the inward projec- 

 tions of the segments ; (2) the 

 transverse septa in the stem of 

 Equisetum or of grasses ; (3) the 

 layer separating the prothallium 



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