Haematoxylum hae·ma·to·xylum uncommon noun 1. small genus of tropical American spiny bushy shrubs or trees Synonymsgenus HaematoxylumHaematoxylongenus Haematoxylon Related words Word family Haematoxylum campechianum Broader terms rosid dicot genus Parts Caesalpinioideae Part of logwood WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.