Agent for change to get a stomach churning over - dope?

• Any agent (physical or environmental) that can induce a genetic mutation or can increase the rate of mutation
• Radiation, e.g.
• Radiation, e.g
• It changes genes

Wiktionary Word definitions in Wiktionary
n. any agent or substance that can cause genetic mutation

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
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].

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1946, from mutation + -gen "thing that produces." Related: Mutagenic ; mutagenesis ; mutagenize .

WordNet Word definitions in WordNet
n. any agent (physical or environmental) that can induce a genetic mutation or can increase the rate of mutation

Wikipedia Word definitions in Wikipedia
In genetics, a mutagen is a physical or chemical agent that changes the genetic material, usually DNA , of an organism and thus increases the frequency of mutations above the natural background level. As many mutations can cause cancer , mutagens are therefore ...