'Sympetalous' definitions:

Definition of 'sympetalous'

adjective

Having a corolla composed of partially or wholly fused petals forming a corolla shaped like a tube or funnel [syn: gamopetalous, sympetalous]

From: GCIDE

Sympetalous \Sym*pet"al*ous\, a. [Pref. sym- + petal.] (Bot.) Having the petals united; gamopetalous. [1913 Webster]