1A dormant plant bud enclosed in a protective covering which enables it to survive during the winter.
2A detachable bud-like organ, typically produced by certain aquatic plants, which functions as a vegetative propagule.
In freshwater bryozoans and sponges: a statoblast which is dormant through the winter.
Late 17th century; earliest use found in John Worlidge (d. 1693), writer on agriculture. From winter + bud.