DOR- 



81 



DUP- 



filament attached to the back of the 



anther, which is immovable (dot.). 

 dorsigrade (dor'sigrad) a. [L. 



dorsum, back ; gradus, step.] 



Having the back of the digit on 



the ground when walking (zool.). 

 dorsispinal (dor'slspl'nal) a. [L. 



dorsum, back ; spina, spine.] Pert. 



or referring to the back and spine 



(anat.). 

 dorsiventral (dor'siven'tral) a. [L. 



dorsum, back ; venter, belly.] With 



upper and lower surfaces distinct 



(bot.). 

 dorsocentral (dor'sosen'tral) a. [L. 



dorsum, back ; centrum, centre.] 



Pert, mid-dorsal surface ; pert. 



aboral surface of Echinoderms 



(zool.). 

 dorsolumbar (dor'solum'bar) a. [L. 



dorsum, back ; lumbus, loin.] Pert. 



lumbar region of the back (zool.). 

 dorsoumbonal (dor'soumbo'nal) a. 



[L. dorsum, back ; umbo, umbo.] 



Lying on the back near the umbo 



(zool?). 

 dorsoventral (dor'soven'tral) a. [L. 



dorsum, back ; venter, belly.] Pert. 



structures which stretch from the 



dorsal to the ventral surface (zool.). 

 dorsulum (dor'sulum) n. [L. d 



back.] The upper surface lying 

 between the collar and scutellum ; 

 the mesonotum (zool.). 



dorsum (dor'stim) n. [L. dorsum, 

 back.] The sulcular surface of 

 Anthozoa ; the tergum or notum 

 of Insects and Crustacea ; the back 

 or higher animals (zool.). 



drepanium (drSpa'nlum) n. [Gk. 

 drepanon, sickle.] A helicoid cyme 

 with the secondary axes developed 

 in a plane parallel to that of the 

 main peduncle and its first branch 

 (dot.). 



dromaeognathous (dro'meog'nathus) 

 a. [Gk. dromein, to run ; gnathos, 

 jaw.] Having a palate in which 

 the palatines and pterygoids do 

 not articulate, owing to the inter- 

 vention of the vomer (zool.). . 



dromotropic (dro'motrop'lk) a. [Gk. 

 dromos, course ; trepein, to turn.] 

 Bent in a spiral (bot.). 



drone (dron) n. [A.S. dran.} The 

 male of any species of bee (zool.). 



drupaceous (droopa'shus) a. [Gk. 



druppa, berry.] Pert, drupe ; 

 bearing drupes ; drupe-like (bot.). 



drupe (droop), n. [Gk. druppa, 

 berry.] A superior, one-celled 

 fruit with one or two seeds and 

 a fleshy sarcocarp, a hard endocarp 

 and the pericarp separable into its 

 component parts (bot.). 



drupels (droop'6lz) n. plu. [Gk. 

 druppa, berry.] The individual 

 components of the fruit of the 

 raspberry (bot.). 



duct (diikt) n. [L. ducere, to lead] ; 

 also ductus. Any tube which 

 conveys fluid or other substance 

 (anat.) ; a tube formed by a series 

 of cells which have lost their walls 

 at the points of contact (bot.). 



ductless glands, glands which do 

 not communicate with any organ 

 directly by means of a duct, e.g. 

 spleen (anat.). 



ductule (dtik'tul) n. [L. ducere, to 

 lead.] The fine thread-like 

 terminal portion of a duct (anat.). 



ductus (duk'tus) n. [L. ducere, to 

 lead.] See duct. 



ductus ejaculatorius, the common 

 duct into which the vasa deferentia 

 open in Insects; a narrow muscular 

 tube at the end of the vas deferens 

 in various invertebrates (zool.). 



duodenal (du'ode'nal) a. [L. duodeni, 

 twelve each.] Pert, duodenum 

 (anat.). 



duodenum (du'dde'num) n. [L. 

 duodeni, twelve each.] That por- 

 tion of the small intestine next to 

 the pyloric end of the stomach 

 (anat.). 



duplication (du'pllka'shun) n. [L. 

 duplex, double.] See chorisis. 



duplicature (du'plika'tur) n. [L. 

 duplex, double.] A circular fold 

 near the base of the protrusible 

 portion of a polyzoan polypide 

 (zool.). 



duplicident (duplis'Idgnt) a. [L. 

 duplex, double ; dens, tooth.] 

 Having two pairs of incisors in 

 the upper jaw, one behind the 

 other (zool.). 



duplicodentate (du'plikoden'tat) a. 

 [L. duplex, double ; dens, tooth.] 

 With the marginal teeth on the 

 leaf bearing smaller teeth-like 

 structures (bot.). 



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