| 释义 |
lymphocyte Phys.|ˈlɪmfəsaɪt|
[f. lympho- comb. f. lymph + -cyte.]
A kind of small leucocyte which has a single round nucleus and little or no granulation in the cytoplasm, constitutes about a quarter of the total leucocytes in the blood stream, is found in large numbers in the lymph nodes and other lymphoid tissue, and is a major agent in most immunological processes. large lymphocytes, which constitute a small proportion of the total number of lymphocytes, are larger than and apparently the precursors of the small lymphocytes, which constitute the bulk of them.
1890Jrnl. Morphol. IV. 108 It is quite generally agreed that the origin of the white corpuscles of the blood is to be found in the lymph leucocytes, or lymphocytes, to borrow a convenient term... The lymphocytes are characterized by a vesicular nucleus, usually with a nucleolus and a scanty reticulum, and by a very small protoplasmic envelope. 1891Rep. Lab. R. Coll. Physicians Edin. III. 118 If this view of the nature of leucocytes is accepted, we at once realise the futility of the attempts..to establish distinctions between the leucocytes found in different situations,—the white blood corpuscles, the wandering cells in the tissues, the lymphocytes of the lymph, lymph-glands and spleen, the thymus-cells, the marrow-cells, &c. 1896Allbutt's Syst. Med. I. 730 He recommends subcutaneous injections of pilocarpine, in order to raise artificially the number and ratio of the lymphocytes. 1905A. Stengel tr. Ehrlich's Dis. Blood 71 At the introduction to this chapter it was pointed out that a retrograde movement in hematology is in progress which attempts to establish the derivation of all the white blood-cells from the lymphocytes. 1913Gulland & Goodall Blood ii. vii. 58 Large lymphocytes have the same general characters as the small lymphocytes. 1962Lancet 26 May 1098/2 The blood-picture was:..eosinophils 2%, lymphocytes 11%, monocytes 1%, [etc.]. 1968Passmore & Robson Compan. Med. Stud. I. xxvii. 4/2 Lymphocytes, or more properly small lymphocytes, to distinguish them from their immediate precursors, the medium and large lymphocytes, are formed in the cortex of lymph nodes by the maturation and division of lymphoblasts and lymphoid stem cells. 1970Courier-Mail (Brisbane) 28 Jan. 30 Unfortunately this desensitisation technique seems to affect only a proportion of the recipient's lymphocytes: the remainder attack the transplant.
attrib.1902Brit. Med. Jrnl. 5 Apr. 832 note, There was..a high lymphocyte percentage.
Hence ˌlymphoˈcytic a., of or pertaining to, or characterized by the presence of, lymphocytes; ˌlymphocyˈtoma (pl. -ˈtomas, -ˈtomata) Path. [-oma], malignant proliferation of lymphocytes; any condition characterized by this; a tumour composed of lymphocytes; ˌlymphocyˈtomatous a.
1896Allbutt's Syst. Med. I. 730 The number of ‘neutrophile’ cells falls rapidly, while the uninuclear or lymphocytic elements increase. 1908Osler & McCrae Syst. Med. IV. 827 The hyperplastic and neoplasm-like conditions of the lymph nodes depending upon an overgrowth of cells of the type of lymphocytes..are here brought into one general class, the lymphocytomata. This includes all the lymphocytomatous tumors classed variously as lymphoma, lymphadenoma, lymphosarcoma, pseudoleukæmia, adenia, lymphadenomatosis, lymphomatosis, etc. 1920J. E. R. McDonagh Venereal Dis. iv. 55 (heading) Syphilitic lymphocytomata. 1949Year Bk. Radiol. 406 The medical profession has believed that no attempt at treatment of lymphoid tumors (lymphosarcoma, lymphocytoma, Hodgkin's disease and macrofollicular lymphoma) will be successful. |