Lignum may refer to:
Lignum, common name of Duma florulenta, plant native to inland Australia Lignum (restaurant), in County Galway, Ireland Lignum, Virginia, unincorporated community in the United States Lignum Ltd, a Canadian forest product company; see John C. Kerr
See also Gmelina lignum-vitreum, plant endemic to New Caledonia Lignin Lignum vitae, trade wood from trees of the genus Guaiacum Lignumvitae Key, island in the Florida Keys Vitex lignum-vitae, Australian rainforest tree