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Pronunciation varies by accent · noun
(chemistry) Any substance that initiates a chemical reaction by the absorption of a photon to form an excited state..
Use photoinitiator when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Photoinitiator means (chemistry) Any substance that initiates a chemical reaction by the absorption of a photon to form an excited state..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use photoinitiator where its definition matches the intended context.
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