Search Result for "lymphokine": 
Wordnet 3.0

NOUN (1)

1. a cytokine secreted by helper T cells in response to stimulation by antigens and that acts on other cells of the immune system (as by activating macrophages); 



WordNet (r) 3.0 (2006):

lymphokine
    n 1: a cytokine secreted by helper T cells in response to
         stimulation by antigens and that acts on other cells of the
         immune system (as by activating macrophages)