Photoinitiator

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Any substance that initiates a chemical reaction by the absorption of a photon to form an excited state.

Etymology

From photo- + initiator.

Related phrases

chemical reactionexcited state

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.