cepaceous

cepaceous

(sɪˈpeɪʃəs)
adj
(Botany) botany having an onion-like smell or taste
[from Latin caepa onion + -aceous]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014