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initiator

Syllabification: in·i·ti·a·tor
Pronunciation: /iˈniSHēˌādər
 
/

Definition of initiator in English:

noun

1A person or thing that initiates someone or something.
Example sentences
  • As initiators of culture and producers of the societies in which we live, the destiny of modern man is our conscious choice.
  • Sudden role reversals make it possible for the initiator to rationalise contradictions.
  • After creating some initial noise its initiator immediately moved to disband it.
1.1 Chemistry A substance that starts a chain reaction.
Example sentences
  • On another front, progress has recently been made in rendering polycondensation itself a controlled, living process by the judicious choice of monomer and well-defined molecular initiators.
  • Macrodiols with different thermal characteristics were prepared using ring-opening polymerization of cyclic diesters or lactones with a low molecular weight diol as an initiator.
  • For the synthetic studies, we made the peptides by polymerising an activated form of the amino acid (the N carboxyanhydride) using a nucleophile as an initiator.
1.2An explosive or device used to detonate a larger one.
Example sentences
  • They're using cell phones as initiators to set off explosive devices when we get down on them.

Definition of initiator in:

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Word of the day orthoepy
Pronunciation: ôrˈTHōəpē
noun
the correct or accepted pronunciation of words