Chestnut

Chestnut is the name for a kind of tree or the nut from the tree.

Chestnut may also be:
In botany:

 American chestnut, one of the most important forest trees throughout much of the eastern United States and southeasternmost Canada
 Chestnut blight, fungal disease
 Chestnut oak, species of oak in the white oak group
 Chinese chestnut
Castanea mollissima, species of chestnut native to China
Sterculia monosperma, also known as Thai Chestnut
 Guiana chestnut, a name for Pachira aquatica
 Horse chestnut, member of the genus Aesculus
 Japanese chestnut, species of chestnut from Japan and South Korea
 Malabar chestnut, a name for Pachira aquatica
 Swamp chestnut oak, species of oak in the white oak section Quercus
 Sweet chestnut, species of chestnut from southeastern Europe and Asia Minor

In geography:

 Chestnut, Illinois, United States
 Chestnut Grove, North Carolina, United States

In zoology:

 Chestnut (coat), color of horse
 Chestnut (horse anatomy), on the legs of horses
 Chestnut Dunnart, dunnart that was described by Van Dyck in 1986
 Chestnut Sparrow, sparrow that likes dry savanna
 Chestnut Teal, dabbling duck found in southern Australia
 Chestnut Woodpecker, bird from South America from Colombia, Venezuela and the Guianas south to Ecuador, Bolivia and northern Brazil, and on Trinidad
 Horse-chestnut leaf miner, a moth

In other fields:

 Chestnut (color), reddish brown
 Chestnut hair, reddish brown hair
 Operation Chestnut, failed British raid by 2 Special Air Service
 Chestnut (joke), British slang for an old or stale joke
 Chestnut (music), piece of music that has been played so much that everyone has grown tired of it

People with the family name Chestnut:

 Cyrus Chestnut, jazz pianist
 Jacob Chestnut, one of the two United States Capitol Police officers killed in the line of duty on July 24, 1998
 Joey Chestnut, competitive eater from San Jose, California
 Morris Chestnut, American movie and television actor