The Collaborative International Dictionary of English v.0.48:
Plumcot \Plum"cot\, n. [Plum + apricot.] (Hort.) A cross between the plum and apricot. [Webster 1913 Suppl.]WordNet (r) 3.0 (2006):
plumcot n 1: hybrid produced by crossing Prunus domestica and Prunus armeniaca [syn: plumcot, plumcot tree] 2: hybrid between plum and apricot