| a shade of brown that is yellowish or reddish; it is a greenish shade of brown when used to describe the color of someone's eyes | deciduous monoecious nut-bearing shrubs of small trees: hazel; sometimes placed in the subfamily or family Corylaceae |
| any of several shrubs or small trees of the genus Corylus bearing edible nuts enclosed in a leafy husk | |
| Australian tree grown especially for ornament and its fine-grained wood and bearing edible nuts | |
| the fine-grained wood of a hazelnut tree (genus Corylus) and the hazel tree (Australian genus Pomaderris) | |