Last Updated：2025/11/21

One who initiates. / (chemistry) A substance that initiates a chain reaction or polymerization.

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initiator

Source Word

initiator

Noun

One who initiates. / (chemistry) A substance that initiates a chain reaction or polymerization.

Japanese Meaning

物事を始める人、発起者、開始者 / （化学）連鎖反応や重合反応を開始する物質、開始剤

As the initiator of the project, she coordinated the first meetings and set the agenda.

プロジェクトの発起人として、彼女は最初の会議を取りまとめ、議題を設定した。

Sense（1）

One who initiates.

Sense（2）

(chemistry) A substance that initiates a chain reaction or polymerization.

Sense（3）

(military) A component of a nuclear weapon that produces a burst of neutrons to trigger a fission chain reaction.

Sense（4）

(computing) A task (in a mainframe computer) that initiates multiple jobs.

Sense（5）

(medicine) A material whose presence in the body eventually leads to cancer.

initiators

（ plural ）