Initiator definition

Frequency:
(chemistry) A substance that initiates a chain reaction or polymerization.
noun
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(computing) A task (in a mainframe computer) that initiates multiple jobs.
noun
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(medicine) A material whose presence in the body eventually leads to cancer.
noun
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One who initiates.
noun
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Other Word Forms

Noun

Singular:
initiator
Plural:
initiators