Botany. belonging to the genus Allium (formerly the family Alliaceae).Compare allium.
having the odor or taste of garlic, onion, etc.
Origin of alliaceous
1785–95; < Latin alli(um) garlic + -aceous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
of or relating to Allium, a genus of plants that have a strong onion or garlic smell and often have bulbs: family Alliaceae . The genus occurs in the N hemisphere and includes onion, garlic, leek, chive, and shallot
tasting or smelling like garlic or onions
of, relating to, or belonging to the Alliaceae, a family of flowering plants that includes the genus Allium
Word Origin for alliaceous
C18: from Latin allium garlic; see -aceous
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