natural killer cell
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natural killer cell
n.
A large granular lymphocyte that kills virus-infected, cancerous, or abnormal cells without first having been exposed to specific antigens and that also produces a variety of cytokines. Also called NK cell.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
nat′ural kill′er cell`
n.
a small killer cell that destroys virus-infected cells or tumor cells without activation by an immune system cell or antibody. Compare killer T cell.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.