Definify.com
Webster 1913 Edition
Liliaceous
Lilˊi-a′ceous
(lĭlˊĭ-ā′shŭs)
, Adj.
(Bot.)
(a)
Of or pertaining to a natural order of which the lily, tulip, and hyacinth are well-known examples.
(b)
Like the blossom of a lily in general form.
Webster 1828 Edition
Liliaceous
LILIA'CEOUS
,Adj.
Pertaining to lilies; lily-like. A liliaceous corol is one that has six regular petals.