■ noun
1》 a cultivated oval hazelnut.
2》 the tree that bears ~s. [ Corylus maxima and other species.]
3》 (also ~ brush ) a brush with bristles forming a flattened oval head, used in oil painting.
Origin
ME fylberd , from Anglo-Norman Fr. philbert , dialect Fr. noix de ~ (so named because it is ripe about 20 August, the feast day of St Philibert ).