BUT'TERWORT, noun A species of Pinguicula, a plant growing on bogs or soft grounds. The leaves are covered with soft pellucid prickles, which secrete a glutinous liquor; and milk, in which these are steeped, or washed, acquires, in a day or two, consistency, and is an agreeable food, used in the north of Sweden.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI