

MLLAXEDEMA 



Melanedema (mel-an-ede / -mah) [fd/.aq, black ; niSr/ua, 



iing] . Melanosis of the lungs. 

 Melanemia (mel-an-e' -me-ah) [ui/.ac, black ; a\ua, 

 1]. The presence in the blood-plasma or in the 

 corpuscles, or in both, of dark pigment-granules due 

 to the disintegration of the hemoglobin. Its most 

 common cause is malaria. If very intense, as in per- 

 nicious forms of malaria, it may give rise to embolism 

 of the capillaries of the brain or other organs. 

 Welanencephaloma \mel-an-en-sef-al-o> '-mah) [ui'/xic, 

 black: b.Kzoa'/Jog, brain; bfia, tumor]. A black 

 outgrowth from the brain. 

 Welanephidrosis (mel-an-ef-id-ro / -sis) [ui/.aq, black ; 

 , ifidpuGic, morbid perspiration]. Black perspiration, 

 or a disease characterized by black perspiration. See, 

 also, Chromidrosis. 

 vlelangeur (mel-an-jur') [Fr.]. The graduated pipet 



of the hemocytometer. 

 tfelanic (mel-an' -ik) [fiz'/.avia, blackness]. Charac- 

 terized by, or pertaining to, a dark color, or to mel- 

 anosis. M. Acid, C 10 H 8 O 5 , a black powder re- 

 sulting from the oxidation of potassium salicylate. 

 It is insoluble in water, soluble in alcohol, ether, 

 and alkalies. 

 Melanicterus (mel-an-ik' -ter-us) [ui.7.ac, black ; t/crepoc, 

 jaundice]. Black jaundice. 



flelanidia (mel-an-id'-e-ah). See Miner's Phthisis. 

 delanilin (mel-an' -il-in) [ ui/.ac, black ; anilin], 

 C I3 H, ..X... A basic substance obtained from cyano- 

 gen chlorid and dry anilin. 

 Melanin (mel'-an-in) [ue/ac, black]. I. A black pig- 

 mentary matter occurring naturally in the choroid coat 

 I of the eye, the skin, the hair, the muscles, and, patho- 

 . .ally, in the skin in Addison's disease and in 

 lanotic tumors. Melanin usually contains sulphur, 

 more rarely iron. From its origin, being a product of 

 cell-activity, it is classed as a metabolic pigment. It is 

 rally soluble in hot alkalies and in hot acids, and 

 - iludons are bleached by chlorin. 2. Specifically 

 applied by Danilewsky to the pigment seen in the 

 hematozoa of men and animals, and formed by these 

 intracellular parasites from the hemoglobin of the red 

 blood-corpuscles which they inhabit. 

 I danism (mel'-an-izm) [fii'/ac, black]. In biology, 

 the abnormal development of dark pigments in an 

 organism. 



lelano-cancroid (mel-an-o-kang'-kroid). Synonym of 

 Melano-carcinoma . 



lelano-carcinoma (mel-an-o-kar-sin-o'-mah) [pe/ac, 

 black; KapKii-uua, carcinoma]. Melanotic carcinoma, 

 telano-chlorosis (mel-an-o-klo-ro'-sis) [ui'/jac, black ; 

 X'upoc, green]. Chlorosis in which the skin has a 

 blackish-green hue. Also the same as Melanicterus. 

 telanochroic, Melanochroous (mel-an-o-kro'-ik, mel- 

 ; an-ok' '-ro-us) [ui'/ac. black ; XP°°> color]. Having a 

 dark color or complexion. 



'elanocomous (mel-an-oV -o-mus) [fiz/xic, black ; 

 , *6(iT] y hair] . Black-haired, 

 elanocyte (mel'-an-o-sit) [ue/nc, black ; kvtoc, cell]. 

 Any wandering lymph-cell that has become dis- 

 colored by the absorption of dark pigment-granules, 

 elanoderma (mel-an-o-der'-mah), Melanodermia 

 (mel-an-o-der' -me-ah) [ue/.ac, black; depua, skin]. 

 Black pigmentation or discoloration of the skin. M., 

 Parasitic. See Vagabonds Disease. 

 elanogen {mel-an' '-o-jen) [melanin, from ue/ac, 

 black ; ytwav, to produce]. A material that becomes 

 converted into melanin on the reception of the appro- 

 priate stimulus. 



elanoid (mel'-an-oid) [ue/.ac, black; eldoc, like]. 

 I >ark-colored ; resembling melanosis. 

 <Aano-\eukemi3i(mel-an-o-lu-£e / -me-ah) [fie /ac.black ; 



739 MELASMA 



/.ei-Koq, white ; a\ua, blood]. Melanemia in associa- 

 tion with leukemia. 



Melanoma (mel-an-o / -mah) [ue'/Avuua, from fie/.ac, 

 black; bua, tumor: pi. , Melanomata]. I. A disease 

 marked by the development and growth of black or 

 dark-colored tubercles within the tissues of the vis- 

 cera. 2. Any tumor containing or characterized by dark 

 pigment. 



Melanomyces (mel-an-o-mi' '-sez) [ui/.ac, black ; fiiiajc, 

 fungus]. A black fungous growth. 



Melanopathy (mel-an-op' -ath-e), Melanopathia (mel- 

 an-o-path' '-e-ali) [ui~/.ac, black ; xadoc, illness]. A 

 disease attended with increase or deepening of the 

 normal pigmentation of a part. 



Melanophthalmous (mel -an -off- thai' -mus) [ue/.ac, 

 black ; bo6a?.fioc, eye]. Black-eyed; having a melan- 

 oma of the eye. 



Melanophyl (mel'-an-o-fl) [jie/xic, black; $i<22.ov, 

 leaf]. A black substance extracted from green leaves 

 by means of hydrochloric acid and ether. 



Melanorrhagia [mel-an- or- a' -je- ah) [ui/.ac, black; 

 prjyTvvai, to burst forth]. The copious discharge of 

 blackened feces. 



Mtlanorrhea (mel-an-or-e'-ah) \jie/ac, black ; poia, a 

 flow]. Synonym of Melena. Also, a genus of the 

 Anacardiacese. M. usitata, M. usitatissima, the 

 black -varnish tree. 



1Ae:\3fi\o-sa.rcom.2i(mel-an-o-sar-ko / -mah)[uD.ac , black ; 

 ffdpf, flesh; 6/ia, tumor]. Melanotic sarcoma. 



Melano-scirrhus (mel-an-o-skir'-us) [uz/joc, black; 

 ctuppoc, hard]. A form of scirrhous carcinoma char- 

 acterized by pigmentation. 



Melanose (mel' '-an-os) [ue/.droxrig , a becoming black]. 

 A disease of grape-vines caused by the fungus Sep- 

 toria pelina. 



Melanosis (mel-an-o'-sis)[ue?xig, black ; v6aoc, disease]. 

 A general tendency to the formation in the blood, and 

 the deposition in the skin, or in organs, of a dark pig- 

 ment. M. lenticularis progressiva. See Xeroderma 

 pigmentosum. 



Melanosity (mel-an-os / -il-e) [/li/.ag, black; v6ooq, dis- 

 ease]. The condition of being melanous ; darkness, 

 as of hair, eyes, or skin. 



M elanospongus (mel -an-o- spon' '- gus). Synonym of 

 Melanomyces. 



Melanothanatos (mel-an-o-than' -at-os). See Plague. 



Melanotic (mel-an-ot'-ik) [ue/.ag, black ; voaoc, disease]. 

 Pertaining to melanosis. 



Melanotrichous (mel-an - of- rik - us) [fie/.ag, black ; 

 Opti;, hair]. Black -haired. 



Melanous (mel'-an-us) [uelag {ue'/av), black]. In 

 ethnology, applied to races with black hair and dark- 

 brown or blackish skins. One of the two divisions of 

 the Melanochroi according to Huxley's classification. 

 Cf. Xanthomelanous. 



Melanuresis (mel-an-u-re / -sis), Melanuria (mel-an-u' - 

 re-ah) [/ie?.ag, black ; ovpov, urine]. The presence of 

 black pigmentary substance in the urine, or the dis- 

 order associated with it. Melanotic tumors are in some 

 way related to this condition. 



Melanuric (mel-an-u' -rik) [ue/ag, black ; ovpov, urine]. 

 Pertaining to, or characterized by, melanuria. 



Melanurin (mel-an-u' -rin) [ui/.ac, black ; ovpov, urine] . 

 A dark pigment found in the urine in melanuria ; it 

 is sometimes associated with the presence in the body 

 of melanotic tumors. 



Melas (mel'-as) [ji£?xic, black]. Black. 



Melasicterus (mel-as-ik' -ter-us) [ue/.ac, black ; Itcrtpoc, 

 jaundice]. Same as Melanicterus. 



Melasma (mel-az'-mah) [ue/ac, black]. Any morbid, 

 dark discoloration of the skin. M., Suprarenal. 

 Same as Addison's Disease. M. Addisonii, Addi- 



