LEPTUNTIC 



333 



LEUKOCYTOPLAXIA 



Leptuntic {fop-tun' -tik). See Leptynticos. Cf. Leptys- 

 tic. 



Leptynticos, Leptynticus (Up-tin' -tik-os, -us) [fefrrw- 

 ■rtKor, making thin]. Attenuating, leptuntic. 



Leptystic {iep-tiY-tik) [Aeirrirvetv, to make thin]. 

 Relating to or affected with emaciation. 



Lesion. See Illus. Diet. ) L., Coarse, L., Gross, 

 L., Molar, L., Macroscopic, a lesion apparent to the 

 naked eye. L., Discharging, a brain lesion that 

 causes sudden discharge of nervous motor impulses. 

 ., Ebstein's, hyaline degeneration and insular necro- 

 of the epithelial cells of the renal tubules in diabetes. 

 ,., Functional, L., Molecular, a very fine lesion, 

 ~A discernible by the microscope or discoverable by 

 lemistry, but causing loss or excess of functional 

 :tivity and attributed to alteration of the molecular 

 quilibrium of that part. L., Indiscriminate, L., 

 fixed, one affecting two distinct systems. L., Negro, 

 ifrican lethargy, L., Structural, one working a 

 anifest change in tissue. L., Toxic, a change in 

 le tissues due to sepsis. L., Vascular, a lesion of a 

 bloodvessel. 



Lethin (le'-thin). The proprietary name for an alco- 

 holic solution of camphor, acetic acid, ethereal oils, 

 and chloroform. 



Leucadendron (lu-ka-den'-dron) \7.evkoc, white ; 6iv- 

 Spov, tree]. A genus of trees of the order Proteacea. 

 L. argenteum, R. Br., and L. coccinum, R. Br., 

 of South Africa, are used in treatment of malaria ; the 

 last contains a bitter principle, leucodrin, and a glu- 

 cosid, leucoglycodrin. 



Leucsena i/w-j^-h^) [/evicdiveiv, to make white]. A 

 genus of leguminous plants. L. glauca, Benth., a 

 species of the West Indies and Africa, cultivated in 

 India and southern Europe. The leaves and unripe 

 fruit \ wild tamarind) are edible ; the seeds yield amylon. 

 In certain animals it has been observed that the hair 

 falls out after eating the leaves and seeds. 



Leucic (In' -sic). Relating to or derived from leucin, 

 as leucic acid. 



Leucinuria {lu-sin-u'-re-ah) [/fiTcoc, white; oipov, 

 urine]. The occurrence of leucin in the urine. 



Leucoalizarin (lu-ko-al-iz'-ar-in). See Anthrarobin 

 Illus. Diet.). 



Leucodrin lu'-ko-drin). See under Leucadendron. 



Leucogen ilu'-ko-Jen). Sodium bisulfite. 



Leucoglycodrin (lu-ko-gli' -ko-drin). See under Leuca- 

 dendron. 



Leucohaemia. See Leukemia. 



Leucojin, Leucojitin (lu'-ko-Jin, lu-ko'-jit-in). See 

 under Leucojum. 



Leucojum (lu-ko'-yum) [/.evuoc, white; lov, a violet]. 

 A genus of plants of the order Amyrillidear. L. 

 aestivum, snowflake, indigenous to Europe and the 

 Orient, contains the alkaloids leucojin and leucojitin. 

 The bulb is emetic and poisonous. 



Leucol, Leucolin (lu'-kol, lu'-kcl-in). Quinolin. 



Leucomma. See Leukoma (Illus. Dict.V 



Leuconostoc (lu-kon-os'-tok) \7xvKoq, white; Nostoc, a 

 genus of Alga"]. A genus of fungi belonging to the 

 Schizomyce'es. See Bacteria, Table of (Illus. Diet.). 



Leucosine (lu'-ko-sen). A yellow pigment abundant in 

 certain flagellate infusoria, as Dinobryon synura. 



Leukemia, Leucaemia. (See Illus. Diet) Syn., 

 White blood-disease; Leukocythemia splenemia. See 

 Sign, Jaccoud's. L., Acute, a generally fatal form 

 characterized by rapid development, high temperature, 

 great enlargement of the spleen and lymphatics, and 

 softening of the bone-marrow. L., Adenoid. See 

 L., Lymphatic. L., Amygdaline, that associated 

 with disease of the tonsils. L.. Chronic, L., Essen- 

 tial. See Leukemia (Illus. Diet.). L. cutis, L. of 



the Skin, a state of the skin characterized by forma- 

 tion of lymphatic enlargements in its deeper layers. 

 L., Fraenkel's, acute leukemia with large mononu- 

 clear lymphocytes. L., Hepatic, a form attributed to 

 liver-disease. L., Intestinal, due to intestinal dis- 

 ease. L. lienalis, splenic leukemia. L., Lieno- 

 medullary, L., Lienomyelogenous. See L., Sple- 

 nomedullary. L., Lymphatic, the most common 

 form, characterized by enlargement of the lymphatic 

 glands, with perhaps slight changes in the spleen. L., 

 Medullary, L., Myelogenous, L., Osseous, L., 

 Polymorphocyte, a form in which the tissue of the 

 bone-marrow is principally affected and obliteration of 

 many of the small blood-vessels takes place. Syn., 

 Myelemia. L., Pseudo-, L., Pseudosplenic. See 

 Lfodgkin's Disease and Lywpkadenoma. L., 

 Splenic, that in which the blood-changes are princi- 

 pally due to disorders of the spleen. L., Spleno- 

 medullary, the form characterized by excessive enlarge- 

 ment of the spleen and proliferation of the marrow of 

 the bones without manifest change in the lymphatic 

 glands. L., Symptomatic, L., Temporary, leu- 

 kocytosis. 



Leukaethiopia (lu-ke-the-o' -pe-ah) [/fi/cdc, white ; 

 Aldioip, Ethiopian]. Albinism in an African. 



Leukoblast. (See Illus. Diet.) 3. Lowit's name for 

 lymphogonia (a. v.). 



Leukocidin (lu-ko'-sid-in) [a-evkoc, white ; ccedere, to 

 kill]. A poison destroying leukocytes, discovered by 

 Van der Velde in exudates caused by infection with 

 Staphylococcus aureus. 



Leukocyte. (See Illus. Diet.) Syn., Hematogenetic 

 ■wandering cell ; Phagocyte. Cf. Color analysis ; Germ- 

 centers of Flemming. L.s, Ehrlich's Theory of the 

 origin and development of, according to which all 

 varieties of leukocytes may be classed into two distinct 

 groups which have separate origins, functions, and 

 relations. The first group consists of the lymphocvte>. 

 large and small, which are produced solely by the 

 lymphatic tissues ; and the second group includes the 

 mononuclear leukocytes and transitional forms, the 

 polynuclear neutrophiles, the eosinophiles, and the 

 basophiles, all of which cells are produced exclusively 

 by the marrow. [Da Costa.] L., Polymorphous, 

 L., Polynuclear, cells in which the nucleus is either 

 lobed or made up of several portions united by such 

 delicate nuclear filaments as to give the impres- 

 sion of a multinucleated cell in distinction to mono- 

 nuclear, eosinophil, and neutrophil leukocytes and 

 lymphocytes. L., Polymorphonucleic, L., Polynu- 

 clearneutrophilic, one derived primarily from lymph- 

 ocytes and secondarily from a myelocyte ; originating 

 in red bone-marrow, in the lymph-glands or spleen. 

 L., Uskow's Theory of the origin and development 

 of, according to which all varieties of the leukocyte, 

 except the basophilic cells, of which no account ap- 

 parently is taken, are but different developmental 

 stages of one and the same cell. The youngest 

 form of leukocyte, the small lymphocyte, originates in 

 the lymph-glands, the lymphocytic bone-marrow, and 

 the spleen. [Da Costa.] 



Leukocytolysin (lu-ko-si-tol'-is-in) [leukocyte; /if/r, 

 to loose]. Metchnikoff 's term for a cytolysin produced 

 by inoculation with leukocytes. 



Leukocytolytic (lu-ko-st-to-lit'-ik). Relating to the 

 destruction of leukocytes. 



Leukocytometer (lu-ko-si-tom'-e-ter) [/.fwede, white; 

 kvtoc, cell; uirpov, measure]. A graduated capillary 

 tube used for counting leukocytes. Cf. Erythrocy- 

 tometer. 



Leukocytopenia. See Leukopenia. 



Leukocytoplania. See Leukopenia. 



