ERYTHREMELALGIA 



441 



KKYTIIki >XYL< »\ 



Erythremelalgia [er-ith- rem-el-al'-Je-ah). See Ery- 

 tkromelalgia. 



Erythremia [er-ith-re' '-me '-ah) [ipvdpdg, red ; alfia, 

 blood]. I. The normal condition of the arterial 

 Mood. 2. Arterial blood in the veins. 



Erythrin [er'-ith-riu) [.•'/""/»";, red], ( ',,,1 l,.< »,„. An 

 ether-like derivative of orsellinic acid. It occurs in 

 the lichen Roccella fusciformis, and is extracted from 

 it by means of milk of lime It crystallizes with i]/ z 

 molecules of water and is soluble with difficulty in hot 

 water. Kxposure to the air causes it to assume a red 

 color. 



Erythrina [er-it k-ri'-nuh) \ipvdp6g, red]. A genus of 

 leguminous trees, shrubs and herbs, of some 25 

 three or more of which grow in the U. S. E. coral- 

 lodendron, coral tree of tropical America, is sedative, 

 hypnotic, diuretic, purgative, vermifuge and pectoral. 

 ( Hher specie^ have similar properties. Unof. 



Erythrine [er' '-ith-rin) [epvBp6g, red]. Red. 



Erythrism [er 4 '-ith-rizm) [epvOpbg, red]. In biology, 

 applied to conditions of dichromatism in which the 

 normal colors of the integument are affected by an 

 excess ot red pigment, as often shown in the plumage 

 of a bird. 



Erythrite (er'-ith -nt ). See Erythrol. 



Erythroblast (er-ith' -ro-b/ast) [ipvdpdg , red ; ftAaordq , 

 germ]. Ar rudimentary red blood-corpuscle. 



Erythrocarpus ( er-ith' '-ro-kar 1 '-pus ) [ipvdpdg, red ; 

 KapTTuc, fruit]. In biology, reel- fruited. 



Erythrochloropia (er-ith' '-ro-klo-ro' '-pe-ah) [kpvdpor, 

 red; ;fAwp<5c, green ; <Ji/>, eye]. A form of subnormal 

 color-perception in which green and red are the only 

 colors correctly distinguished. 



Erythrochloropy [er-ith' -ro-klor'-o-pe) [ipvdpdg, red; 

 X/.upog, green]. Ability to distinguish red and green 

 colors only. 



Erythrocruorin [er-ith' '-ro-kru' '-or-iri) [ipvdpdg, red; 

 cruor, blood]. Same as Hemoglobin. 



Erythrocyte [er-ith 1 '-ro-sit) [ipvdpdg, red; kitoc, cell] 

 A red blood-corpuscle. 



Erythrocytosis [er-ith 1 '-ro-si-to> '-sis) [ipvdpdg, red ; kvtoq, 

 cell]. The formation of red blood-corpuscles. 



Erythrodermia [er-ith' -ro-der'-me-ah) [ipvdpdg, red; 

 Sipua, skin]. Abnormal redness of the skin. 



Erythrodermas [er-ith' -ro-der-mi'-tis) [epvdpdg, red; 

 dipua, skin; trig, inflammation]. A chromoder- 

 matosis characterized by erythema and superficial 

 dermatitis. 



Erythrodextrin [er-ith' -ro-deks' -trin\ [ipvdpdg, red; 

 dexter, right]. A dextrin formed by the action of 

 saliva on starch. It yields a red color with iodin. . 



.'R.rythrpgpn [er-ith' '-ro-jen) [ipvdpdg, red; yevvav, to 

 produce]. A green substance that has been found in 

 unhealthy bile, and which (apparently without good 

 reason) has been regarded as " the base of the color- 

 ing-matter of the blood." 



Erythroglucin [er-ith-ro-glu'-sin). See Erythrol. 



Erythrogranulose [er-ith-ro-gran' -u-los) [ipvBpdg, red; 

 granulum, a little grain]. A granular substance, 

 found in starch-grains, coloring red with iodin. 



Erythroid [er' -ith-roid) [epvdpdg, red; eldog, re- 

 semblance]. Reddish; of a red color. 



Erythrol [er'-ith-rol) [ipvtipdc, red], C 4 H 10 O 4 . Uso 

 called Erythroglucin, Erythrite or Phycite. A princi- 

 ple which exists as erythrin (orsellinate of erythrite) in 

 many lichens and some alg;e. It forms large quadratic 

 crystals that dissolve- readily in water, with difficulty 

 in alcohol, and are insoluble in ether. It is a poly- 

 hydric alcohol with a sweet taste melting at I2b° C. 

 and boiling at 330 C. 



Erythrolein [er-ith-ro* '-le-in) [ipvdpdg, red ; oleum, oil], 

 C^H^O,^ A fatty liquid compound contained in 



litmus. It is soluble in alcohol, ether, and alka 

 and in dyeing yields a purple color 



Erythrolitmin [er-ith-ro-lW -min) [ipvdpdg, red; Dan., 

 lac, lac; moes, pulp], 1 , I 1 ' I ... A red coloring- 

 matter obtained from litmus; it is crystalline and 

 soluble in alcohol. 



Erythromelalgia [er-ith-ro mel-al' -je-ah) [kpvfi 

 red; "'/or, limb; "/,'», pain]. Red neuralgia; 

 terminal neuritis. A variety of chronic dermatalgia 

 characterized by burning and then aching pain of a 

 part, usually one or more extremities, intensified by 

 warmth and accompanied by flushing and local fever. 



Erythrophage [er-ith' -ro-faj) [kpvtip6g, red; 



to eat]. Any one ol the phagocytic cells which, 

 lying about a hemorrhagic area, take up the pign 

 of the blood or even red-corpuscles. They are 

 remarkable for their brilliant color (red to golden). 



Erythrophlein [er-ith-rof -le-in) [ipvdpdg, red ; 

 bark], A poisonous alkaloid from Casca bark. 



Erythrophleum | « ith-ro-flc'-ioii Si Casca Bark. 



Erythrophobe [er-ith' -ro-fob) [ipvdpdg, red ; ' 

 fear]. One fearing or disliking red color>. 



Erythrophobia [er-ith-ro-fo 1 '-be-ah) [>'.■ red; 



in, -Inc. fear]. Morbid intolerance of red colors: 

 sometimes observed after operations for cataract. 



Erythrophyl [er-ith' -ro-fil) [epvdpdg, red; QvWKov, 

 leaf]. In biology, a red coloring-matter found in 

 autumn leaves, ripe fruits, etc. It is also called Phyl- 

 lerythrin and Phyterythrin. 



Erythropia (er-ith-ro' pe-ah) [ .vision]. 



A condition in which objects appear as if colored red. 



Erythropsia [er-ith-rop' -se-ah) [ipvdpdg, red ; 



vision]. An abnormality of vision in which all ob- 

 jects appear red ; red vision ; it has been observed in 

 alcoholic ataxia with optic atrophy, after subcutan 

 injections of strychnin. 



Erythropsin [er-ith-rop' -sin) [epvdpdg, red; wi/', 

 vision]. An organic substance of the retina. In the 

 presence of light it is believed to form different com 

 binations, constituting color-perception. It is called 

 visual purple and Rhodopsin, q. v. 



Erythrorhetin [er-ith-ro-ref -in) [epvdpdg, red; peric//, 

 resin], C,JI,,.< > u . The red resin of rhubarb. 



Erythrose [er'-ith-ros) [epvdpdg, red], C 4 H 8 < >,. Tetrose. 

 A substance derived from erythrol. It is probably a 

 mixture of an aldose and a ketose. It is next to the 

 lowest glucose. See Carbohydrates, Tab.' 



Erythrosin [er'-ith-ro-sin) [ipvdpdg, red], C 30 H 18 N 2 < >,.,• 

 A compound produced by the action of HNi > , on tyro 

 sin. It is used as a coloring-matter. See Pigm 

 Conspectus of. 



Erythrosis [er-ith-ro' -sis) [ipvdpdg, red]. Arterial pleth- 

 ora, or the redness of the skin due to it. 



Erythroxylin [er-ith-roks' -il-in) [epvdpdg, red; fwAov, 

 wood]. A precipitate from the tincture of Erythroxy- 

 lon coca. It is a nervine and stimulant. Dose ' 4 to 

 I grain. Unof. 



Erythroxylon [er-ith-roks' -il-on) [epvdpdg; red; ir/nr, 

 wood: gen. ,Erythroxyli\. Coca, Cuca. The leave-, 

 of E. coca, a shrub indigenous to the Andes. (Not to 

 be confounded with cooa.) It contains an alkaloid, 

 Cocain, C 17 H.,,N< >,. ., to which its properties are 



mainly due. It is an aromatic tonic and cerebral stimu- 

 lant, developing a remarkable power ot enduring 

 hunger and fatigue. Large doses cause hallucinations. 

 It- effects are similar to those of coffee, but are more 

 intense. It is much used by the natives for sustenance 

 during long journeys. The leaves, smoked, are bene- 

 ficial in hay-fever. E. coca (R. P.). Dose gr. ij- 

 xv. E., Ext., Fid. Dose ^ ss-ij. Extractum 

 Cocae Liquid (R. P.). Dose 5 ss-ij. Wines and 

 elixirs of coca are numerous. 



