DUL 



134 



DYS 



excretory duct which leads from 

 the neck of the gall-bladder to 

 join the hepatic : d. hepaticus, 

 'he-pat'-ik-us (Gr. hepatikos, affect- 

 ing the liver from hepar, the 

 liver), the hepatic duct, formed 

 by the union of the biliary pores, 

 and proceeds from the liver to 

 the duodenum : d. lachrymalis, 

 Idk^ri-mdl'-fo (L. lachrymalis, 

 lachrymal from Idchryma, a 

 tear), the lachrymal duct ; the 

 excretory ducts of the lachrymal 

 gland : d. thoracicus, thor>as f > 

 ik-us (Gr. thorax, the breast, 

 thordkos, of the breast; L. thorax, 

 thordcis}, the great trunk formed 

 by the junction of the absorbent 

 vessels. 



dulcamara, n., dulJc'dm-dr^d (L. 

 dulcis, sweet ; amarus, bitter), 

 a common British hedge-plant, 

 called * bitter-sweet ' or ' woo.dy 

 nightshade, ' from the root ,when 

 chewed first tasting bitter, and 

 then sweet ; the Solanum dulca- 

 mara, Ord. Solanaceae : dulca- 

 marine, n., dul&d-mdr'in, an 

 extract from the plant, 

 dumose, a., dum-oz' (L. dumosus, 

 covered with bushes from dumus, 

 a thorn-bush), full of bushes ; 

 having a low, shrubby aspect. 

 duodenum, ,n., du'-d-den-um (L. 

 duodeni, twelve each), the first 

 portion of the small intestines im- 

 mediately succeeding the stomach, 

 which in man is about eight or ten 

 inches in length : duodenal, a., 

 du'ti'den'-dl, connected with or 

 relating to the duodenum. 

 Dura-Mater, n., dur'd-mdt'-er (L. 

 durus, hard ; mater, a mother), 

 the semi-transparent outer mem- 

 brane which invests and protects 

 the brain and spinal cord. 

 duramen, n., dur-dm'-Zn (L. dur- 

 amen, hardness from durus, 

 hard), the inner or heart wood of 

 a tree. 



Durio, n., dur^l-o (from duryon, 

 the native Malay name for the 

 fruit), a genus of trees, Ord. 



Sterculiacese : Durio zibethinua, 

 zW-Wi'ln'-us (said to be from Arab. 

 zobeth, civet), the tree which pro- 

 duces the fruit called durian, or 

 civet durian, in the Indian Archi- 

 pelago ; the fruit is about the 

 size of a man's head, and con- 

 sidered the most delicious of 

 Indian fruits, though of a very 

 fetid odour. 



Durvillea, n,, dur-viV-U-d (after 

 D'-Urville), a genus of sea-plants, 

 Ord. Algse : Durvillea utilis, 

 ut'U-is (L. utilis, useful), one of 

 the large - stemmed species of 

 Algae. 



dynamics, n. plu., din-am' iks (Gr. 

 dunamis, power), that branch of 



.mechanics which investigates the 

 effects of forces not in equilibrium 



.but producing motion : dynam- 

 ometer, n,, dm'am-dm'Zt-er (Gr. 

 metron, a measure), an instrument 

 for measuring the muscular power 

 of men and animals. 



dyscrasia, n., dis-krazti-d (Gr. 

 duscrdsia, a bad mixture from 

 dus, an in separable particle, denot- 

 ing 'with pain,' 'with difficulty,' 

 * badly ' ; krasis, a mixture), a 

 morbid or bad state of the vital 

 fluids. 



dysentery, n., dis<ent-$r-i (Gr. 

 dus8nt$ria, L. dysentZria, a flux, 

 dysentery from dus, badly ; 

 entera, the bowels), a flux or 

 looseness of the bowels, with a 

 discharge -of blood and mucus, 

 and griping pains. 



dysmenorrhoea, n., c?fe-rae7i-#r-re'a 

 (Gr. dus, badly ; menes, the 

 menstrual discharges ; rheo, I 

 flow), difficult menstruation. 



dyspepsia, n., dis-peps'-i-d (Gr. 

 duspepsia, difficulty of digestion 

 from dus, badly ; pepto, I 

 digest), bad or difficult digestion. 



dysphagia, n., diS'/ddf-i-a (Gr. 

 dus, badly ; phago, I eat), diffic- 

 ulty of swallowing. 



dyspnoaa, n., disp-ne'-d (Gr. dusp- 

 noia, L. di/spncea, difficulty of 

 breathing from dus, badly; pneo, 



