English Dictionary

oakbark

noun

The bark of the oak tree, often specifically as a source of tannic acid; tan.

The oakbark is used in tanning leather.

意味（1）

The bark of the oak tree, often specifically as a source of tannic acid; tan.

Some kinds of fish oils are similarly improved by vigorous agitation with oakbark infusion or other liquors containing tannin, conveniently effected by blowing a rapid current of steam through the whole: […]