belonging to the plant family Amaranthaceae.
Compare amaranth family.
Origin of amaranthaceous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
of, relating to, or belonging to the Amaranthaceae (or Amarantaceae), a family of tropical and temperate herbaceous or shrubby flowering plants that includes the amaranths and cockscomb
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