belonging to the Theaceae, the tea family of plants.
Compare tea family.
Origin of theaceous
< New Latin the(a) tea + -aceous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
of, relating to, or belonging to the Theaceae, a family of evergreen trees and shrubs of tropical and warm regions: includes the tea plant
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012