mitochondrion

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mitochondrion (my-toh-kon-dri-ŏn) n. (pl. mitochondria) a structure, occurring in varying numbers in the cytoplasm of every cell, that is the site of the cell's energy production. Mitochondria contain ATP and the enzymes involved in the cell's metabolic activities, and also their own DNA; mitochondrial genes are inherited through the female line.
—mitochondrial adj.

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