\Pet`al*oid"e*ous\, a. (Bot.)
Having the whole or part of the perianth petaline.
{Petaloideous division}, that division of endogenous plants
   in which the perianth is wholly or partly petaline,
   embracing the {Liliace[ae]}, {Orchidace[ae]},
   {Amaryllide[ae]}, etc.