FLOW'ER-DE-LIS, noun 1. In heraldry, a bearing representing a lily, the hieroglyphic of royal majesty. 2. In botany, the Iris, a genus of monogynian trianders, called also flag-flower, and often written incorrectly flower-de-luce. The species are numerous.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI