filbert
/ˈfɪlbət/noun
1
- a cultivated hazel tree that bears edible oval nuts榛（树）。
1.1
- Genus Corylus, family Betulaceae: several species, in particular the Kentish cob (Corylus maxima).榛属, 桦木科：数种, 尤指马氏榛。
1.2
- the nut of this tree榛子。亦称
COB1 .
2
- （亦作filbert brush）a brush with bristles forming a flattened oval head, used in oil painting（油画用的椭圆形平头）榛子形毛笔。
词源
Middle English fylberd, from Anglo-Norman French philbert, dialect French noix de filbert （so named because it is ripe about 20 August, the feast day of St Philibert）.