\Pink"ster\, n. [D. pinkster, pinksteren, fr. Gr. ?. See {Pentecost}.] Whitsuntide. [Written also {pingster} and {pinxter}.] {Pinkster flower} (Bot.), the rosy flower of the {Azalea nudiflora}; also, the shrub itself; -- called also {Pinxter blomachee} by the New York descendants of the Dutch settlers.