Last Updated：2025/11/21

(biology) The larger of the two nuclei present in ciliate protozoans; it controls the nonreproductive functions of the cell.

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macronucleus

Source Word

macronucleus

Noun

(biology) The larger of the two nuclei present in ciliate protozoans; it controls the nonreproductive functions of the cell.

Japanese Meaning

繊毛虫など、一部の原生動物に見られる、細胞の非生殖機能を制御する大核（大きな核）のこと

Under the microscope, the macronucleus of the Paramecium appeared to control the organism's daily cellular activities.

顕微鏡で観察すると、ゾウリムシの顕在核がその生物の日常的な細胞活動を制御しているように見えた。

Sense（1）

(biology) The larger of the two nuclei present in ciliate protozoans; it controls the nonreproductive functions of the cell.

macronuclei

（ plural ）