belonging to the Poaceae, an alternate name for the plant family Gramineae.
Compare grass family.
Origin of poaceous
< New Latin Po(a) the type genus (< Greek póa grass) + -aceous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
of, relating to, or belonging to the plant family Poaceae (grasses)
Word Origin for poaceous
C18: via New Latin from Greek poa grass
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