Meaning of hickory oil in English:
hickory oil
noun
1Oil extracted from the nuts of a North American hickory tree and used traditionally by North American Indians as a source of food (now chiefly historical).
2US figurative Corporal punishment using a hickory switch or similar instrument, viewed as a treatment for bad behaviour (now rare).
Origin
Late 17th century; earliest use found in Robert Hooke (1635–1703), natural philosopher.
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