mistresspiece means A work by a woman that exhibits outstanding creativity, skill or cleverness. Lexicurio rates it Rare gem — a strength score of 83 out of 100.
Etymology
From mistress + piece, by analogy with masterpiece.
noun
- A work by a woman that exhibits outstanding creativity, skill or cleverness.“This Herb is Venus’s Miſtreſs[-]piece, and is as gallant and univerſal Medicine for all Diſeaſes coming of Heat, whereſoever they be, or in what Part of the Body ſoever they be, as the Sun ſhines upon; […]”