ultrafast Papanicolaou (Pap) stain

ul·tra·fast Pap·a·ni·co·laou (Pap) stain

(ŭl'tră-fast' pahp'ă-nē'kō-low pap stān) A modified stain suitable for use in situations in which rapid decisions are essential and frozen sections may not be sufficiently reliable or practical.
See also: Papanicolaou (Pap) stain