The Collaborative International Dictionary
Winterweed
Winterweed \Win"ter*weed`\, n. (Bot.)
A kind of speedwell ( Veronica hederifolia) which spreads
chiefly in winter.
--Dr. Prior.
Wiktionary
winterweed
n. (context botany English) ''Veronica hederifolia'', a kind of speedwell that spreads chiefly in winter.