initiator
noun
ini·ti·a·tor
in-ˈish-ē-ˌāt-ər 
: one that initiates: as
a
: a substance that initiates a chemical reaction
b
: a substance that produces an irreversible change in bodily tissue causing it to respond to other substances which promote the growth of tumors
Cite this Entry
“Initiator.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/initiator. Accessed 13 Mar. 2025.
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