- blackwood - very dark wood of any of several blackwood trees
--1 is a kind of wood
--1 is a substance of blackwood, blackwood tree- blackwood, blackwood tree - any of several hardwood trees yielding very dark-colored wood
--2 is a kind of tree
--2 has substances: blackwood
--2 has particulars:lightwood, Acacia melanoxylon; logwood, logwood tree, campeachy, bloodwood tree, Haematoxylum campechianum; black mangrove, Avicennia marina - blackwood, blackwood tree - any of several hardwood trees yielding very dark-colored wood