Grăd'ū-ā'tor, n.

n. [N. Lat., from L. Lat. graduare. See GRADUATE, v.]

1. One who graduates; as, a graduator of mathematical instruments.
2. An instrument for dividing any line, right or curve, into small, regular intervals.
3. A vessel for accelerating the formation of vinegar by arrangements to diffuse the liquid over a large surface, so as to secure rapid acetification, in consequence of exposure to the air. Ure.