guaiac uncommon noun 1. hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum Synonymslignum vitaeguaiacum Related words Word family GuaiacumGuaiacum officinaleGuaiacum sanctumguaiacum woodguaiac wood Broader terms wood Parts lignum vitae WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
