ERYTHREMELALGIA 



441 



ERYTHROXYLON 



Erythremelalgia {er-ith-rem-el-al' '-je-ah). See Ery- 

 thromelalgia. 



Erythremia {er-ith-re' -me-ah) [kpvdpoc, red ; aifia, 

 blood]. I. The normal condition of the arterial 

 blood. 2. Arterial blood in the veins. 



Erythrin {er' '-ith-rin) [epvdpog, red], G^H^Oj,,. 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^ 

 molecules of water and is soluble with difficulty in hot 

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

 color. 



Erythrina {er-ith-ri' '-nah) [kpvBpoq, red]. A genus of 

 leguminous trees, shrubs and herbs, of some 25 species, 

 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. 

 Other species have similar properties. Unof. 



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



Erythrism (er* -ith-rizm) [epvOpdq, red]. In biology, 

 applied to conditions of dichromatism in which the 

 normal colors of the integument are affected by an 

 excess of red pigment, as often shown in the plumage 

 of a bird. 



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



Erythroblast {er-ith' '-ro-blast ) [kpvdpog, red ; ji/Mordg, 

 germ]. A rudimentary red blood-corpuscle. 



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

 Kap-oq, fruit]. In biology, red-fruited. 



Erythrochloropia {er-ith' -ro-klo-ro' -pe-ah) \ip\£poq, 

 red; x /XJ P0Q, green ; w^, 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) [kpvdpoc, red; 

 x't-upoc, green]. Ability to distinguish red and green 

 colors only. 



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

 cruor, blood]. Same as Hemoglobin. 



Erythrocyte (er-ith 1 '-ro-stt) [kpvOpdc, red;- kvtoc, cell]. 

 A red blood-corpuscle. 



Erythrocytosis {er-ith' -ro-si-to' -sis) \kpv0p6c,xz& ; kvtoc, 

 cell]. The formation of red blood-corpuscles. 



Erythrodermia {er-ith' -ro-der' -me-ah) \ipv0p6c, red; 

 depua, skin]. Abnormal redness of the skin. 



Erythrodermitis {er-ith' -ro-der-mi' -lis) [kpvOpoc, red ; 

 depua, skin; itic, inflammation]. A chromoder- 

 matosis characterized by erythema and superficial 

 dermatitis. 



Erythrodextrin {er-ith' -ro-deks'-trin) [kpvOpdc, red ; 

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

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



Erythrogen {er-ith' -ro-jen) \kpv0p6c, red ; yewav, 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) [kpvOpoc, red ; 

 granulum, a little grain]. A granular substance, 

 found in starch-grains, coloring red with iodin. 



Erythroid {er 1 '-ith-roid) [kpvOpoc, red ; elSoc, re- 

 semblance]. Reddish; of a red color. 



Erythrol (er'-ith-rol) [kpvOpdc, red], C 4 H 10 O 4 . Also 

 called Erythroglucin, Erythrite or Phycite. A princi- 

 ple which exists as erythrin (orsellinate of erythrite) in 

 many lichens and some algse. 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 126 C. 

 and boiling at 330 C. 



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

 C^Hj./Dj. A fatty liquid compound contained in 



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

 and in dyeing yields a purple color. 



Erythrolitmin {er-ith-ro-lif -min) [kpvOpdc^ red ; Dan., 

 lac, lac; moes, pulp], C^HjjOjj. A red coloring- 

 matter obtained from litmus ; it is crystalline and 

 soluble in alcohol. 



Erythromelalgia {er-ith-ro mel-al' -je-ah) [kpv0p6c, 

 red ; uk'/joc, limb ; a/.yoc, 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-fa/) [kpvOpoc, red ; Oayeiv, 

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

 lying about a hemorrhagic area, take up the pigment 

 of the blood or even red-corpuscles. They are 

 remarkable for their brilliant color (red to golden). 



Erythrophlein {er-ith-ro/' -le-in) [kpvOpdc, red ; <f/joioc, 

 bark]. A poisonous alkaloid from Casca bark. 



Erythrophleum {er-ith-ro-fW -um). See Casca Bark. 



Erythrophobe {er-ith' -ro-fob) [kpvOpoc, red ; po3eiv, to 

 fear]. One fearing or disliking red colors. 



Erythrophobia {er-ith-ro-fo' -be-ah) [kpvOpoc, red ; 

 c, fear]. Morbid intolerance of red colors: 

 sometimes observed after operations for cataract. 



Erythrophyl {er-ith' -ro-fil) [kpvOpoc, red ; pr//.oi>, 

 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) [kpvCp6c, red; &$, vision]. 

 A condition in which objects appear as if colored red. 



Erythropsia {er-ith-rop> '-se-ah) [kpvOpoc, red ; tyiq, 

 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 subcutaneous 

 injections of strychnin. 



Erythropsin {er-ith -rop* -sin) [kpvOpdc, red; urfi, 

 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) \ipvBp6c, red ; perivij, 

 resin] , C 3g H :i6 O u . The red resin of rhubarb. 



Erythrose {er'-ith-ros) \ipvdp6c, red], C 4 H g 4 . 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, Table of. 



Erythrosin {er'-ith-ro-sin) [kpvdpoq, red], C^H^NjOg. 

 A compound produced by the action of HXO s on tyro- 

 sin. It is used as a coloring-matter. See Pigments, 

 Conspectus of. 



Erythrosis {erith-ro'-sis) [epvdpSq, red]. Arterial pleth- 

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



Erythroxylin {er-ith-roks' -il-in) [kpvdpdg, red ; I-'vIjov, 

 wood] . A precipitate from the tincture of Erythroxy- 

 lon coca. It is a nervine and stimulant. Dose % to 

 I grain. Unof. 



Erythroxylon {er-ith-roks' -U-on) \kpv8p6g, red ; %v7jn>, 

 wood : gen. , Erythroxyli\ . Coca, Cuca. The leaves 

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

 be confounded with cocoa.) It contains an alkaloid, 

 Cocain, C 1T H,,X0 4 , q. v., to which its properties are 

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

 lant, developing a remarkable power of enduring 

 hunger and fatigue. Large doses cause hallucinations. 

 Its 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 (B. P.). Dose gr. ij- 

 xv. E., Ext., Fid. Dose 3 ss-ij. Extractum 

 Cocae Liquid (B. P.). Dose 3 ss-ij. Wines and 

 elixirs of coca are numerous. 



