• (a.) Of or pertaining to the nectary of a plant. • (a.) Of or pertaining to the nectary of a plant.
Nec·ta'ri·al adjective Of or pertaining to the nectary of a plant. 
nectarial A reference to the nectary of a plant. The nectary is that part of a blossom which secretes nectar, usually the base of the corolla or petals; also, the spur of such flowers as the larkspur and columbine, whether nectariferous or not.