n. Same as gradual, 2.n. In medieval legend, a cup or chalice, called more particularly the holy grail or sangreal, supposed to have been of emerald, used by Christ at the last supper, and in which Joseph of Arimathea caught the last drops of Christ's blood as he was taken from the cross.n. Fine particles: in the quotation apparently referring to the fine beads or air-bubbles of mantling liquor.n. Fine gravel; sand.n. One of the smaller feathers of a hawk.n. A single-cut file with one curved and one straight face, used by comb-makers.In comb-making, to treat with a single-cut file or grail.