- tracery (n.)
[tracery 词源字典]
- mid-15c., "a place for drawing," formed in English from trace (v.) + -ery. Architectural sense, in reference to intersecting rib work in the upper part of a gothic window, is attested from 1660s. "Introduced by Wren, who described it as a masons' term" [Weekley].[tracery etymology, tracery origin, 英语词源]