zygophyllaceous (?za????f??le???s; ?z??-) adj (Botany) of, relating to, or belonging to the Zygophyllaceae, an Old World family of flowering plants having pinnate leaves and capsules as fruits: includes the lignum vitaeCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014