oilstone (iou) and tartrovinic (medicine)

oilstone (iou)

oilstone noun & verb. L16.
[from OIL noun + STONE noun.]
A. noun. A smooth, fine-grained stone lubricated with oil for sharpening tools; a whetstone. L16.
b. verb trans. Sharpen on an oilstone. rare. L19.

tartrovinic (medicine)

tartrovinic
<chemistry> Of, pertaining to, or designating, a certain acid composed of tartaric acid in combination with ethyl, and now called ethyltartaric acid.

Origin: Tartro- + vinic.

Source: Websters Dictionary

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