- a type of white blood cell having a large, spherical nucleus surrounded by a thin layer of nongranular cytoplasm.
Origin of lymphocyte
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for lymphocyte
When large forms of the lymphocyte are present, the distinction is often difficult or impossible.A Manual of Clinical Diagnosis
James Campbell Todd
The macrocyte is believed by many to represent a further stage in the development of the lymphocyte.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for lymphocyte
Online Etymology Dictionary, © 2010 Douglas Harper
- Any of the nearly colorless cells formed in lymphoid tissue, as in the lymph nodes, spleen, thymus, and tonsils, constituting between 22 and 28 percent of all white blood cells in the blood of a normal adult human. They function in the development of immunity and include two specific types, B cells and T cells.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- Any of various white blood cells, including B cells and T cells, that function in the body's immune system by recognizing and deactivating specific foreign substances called antigens. B cells act by stimulating the production of antibodies. T cells contain receptors on their cell surfaces that are capable of recognizing and binding to specific antigens. Lymphocytes are found in the lymph nodes and spleen and circulate continuously in the blood and lymph.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.