Search Result for "mutagen": 
Wordnet 3.0

NOUN (1)

1. any agent (physical or environmental) that can induce a genetic mutation or can increase the rate of mutation;


The Collaborative International Dictionary of English v.0.48:

mutagen \mu"ta*gen\ (m[=u]"t[.a]*j[e^]n), n. A chemical compound or other external influence (such as ionizing radiation) which causes mutations[3]. [PJC]
WordNet (r) 3.0 (2006):

mutagen n 1: any agent (physical or environmental) that can induce a genetic mutation or can increase the rate of mutation