is a specific kind of: citrus, citrus tree.

is a broader term that covers: bigarade, bitter orange, bitter orange tree, Citrus aurantium, marmalade orange, Seville orange, sour orange | bergamot, bergamot orange, Citrus bergamia | Citrus sinensis, sweet orange, sweet orange tree | Citrus nobilis, king orange, tangor, temple orange, temple orange tree.

has as a part: orange.

is a member of: genus Citrus.

contains: orangewood.