Definition of: osier

(ō′zhər) noun
1. Any various species of willow (genus Salix), producing long, flexible shoots used in wickerwork, especially the European velvet osier (Salix viminalis).
2. One of the shoots of an osier.
3. A similar plant of some other genus or family, or its osierlike shoots, as the squawbush.
—adjective Consisting of twigs of willow, etc.] <OF, prob. <Med. L ausaria, osaria a bed of willows]