Search Result for "cytochrome": 
Wordnet 3.0

NOUN (1)

1. (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration); 



WordNet (r) 3.0 (2006):

cytochrome
    n 1: (biochemistry) a class of hemoprotein whose principal
         biological function is electron transfer (especially in
         cellular respiration)