torchwood UK /ˈtɔːtʃwʊd/US /ˈtɔɹt͡ʃˌwʊd/noun 10forms 1 noun10 •Wood used to make torches. •A tree yielding wood suitable for making torches, especially a tree of the genus Amyris. •Amyris balsamifera (balsam torchwood) •Amyris diatrypa (hairy torchwood) •Amyris elemifera (sea torchwood) •Amyris madrensis (mountain torchwood) •Amyris texana (Texas torchwood) •Wood exhibiting fungal bioluminescence or foxfire. •A type of cactus (Stenocereus heptagonus, syn. Cactus heptagonus). •Ixora brachiata formstorchwoods