‖ leucosis
(l(j)uːˈkəʊsɪs)
Pl. leucoses.
[a. Gr. λεύκωσις, f. λευκοῦν to make white, f. λευκός white.]
a. Pallor, whiteness (Syd. Soc. Lex. 1888). b. The process of becoming an albino; the condition of an albino. c. The formation of leucoma (Syd. Soc. Lex.).
| 1706 Phillips (ed. Kersey), Leucosis, a whitening of the Face, Teeth, or other Parts of the Body. 1842 Prichard Nat. Hist. Man 79 Symptoms of leucosis in their eyes, hair, and skin. |
d. Also leukosis. [a. G. leukosis (Ellermann & Bang 1908, in Centralbl. f. Bakteriol. Parasitenkunde u. Infectionskrankh. (Erste Abteil., Originale) XLVI. 609).]= leukæmia; esp. any of various leukæmic diseases of animals. Also bovine leucosis, a leukæmic disease of cattle; (avian or fowl) leucosis complex, a group of poorly-differentiated leukæmic diseases of poultry which are typically transmissible.
| 1922 V. Ellermann Leucosis of Fowls & Leucemia Probl. i. 9 Finally, it must be mentioned that Ellermann & Bang have proposed the word ‘leucosis’ as a common designation for leucemic and aleucemic cases, myeloses as well as lymphadenoses. 1927 A. Piney Recent Adv. Hæmatol. iii. 35 The name ‘leucosis’ is suitable for all forms, either lymphatic or myeloid, and is much to be preferred to leukæmia. 1935 Whitby & Britton Disorders of Blood xviii. 357 (heading) The leukæmias (leucoses). 1936 Jrnl. Amer. Vet. Med. Assoc. LXXXIX. 681 (heading) A study of transmissible fowl leukosis. 1941 Ibid. XCIX. 214/1 (heading) Studies on production of specific antibodies against the agent of the fowl-leucosis complex. 1943 Barger & Card Dis. & Parasites Poultry (ed. 3) vii. 177 The cause of the avian leukosis complex or fowl paralysis is a filter-passing agent. 1946 Physiol. Rev. XXVI. 48 The term leukemia or leukosis implies neoplasia of a blood cell (hemoblastosis) including both the aleukemic and leukemic types of the disease. 1960 Proc. 7th Congr. European Soc. Haematol. ii. 291 (heading) The haematology of bovine leucosis. 1961 Brit. Vet. Jrnl. CXVII. 326 The separation of fowl paralysis granuloma from the leucoses has been suggested by Campbell. 1970 Times 13 Apr. 11/4 Only non-vaccinated maiden heifers and young bulls will be allowed in, and the stock will have to be cleared..of foot-and-mouth disease, tuberculosis, brucellosis, leucosis, leptospirosis, and Johnes disease. |