killer cell definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of various cells that destroy germs, infected cells, etc.; esp., a lymphocyte () that destroys infected or cancerous cells by releasing proteins that damage the cell membranes of the target cells
killer cell definition by American Heritage Dictionary
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Any of various large differentiated T cells that recognize and lyse target cells bearing a specific foreign antigen, usually by infection with a virus, and that also function in defense against cancer cells. Also called cytotoxic T cell, killer T cell.
killer cell - Medical Definition
A large differentiated T cell that attacks and lyses target cells bearing specific antigens. Also called cytotoxic T cell, killer T cell, null cell.