Emily Dickinson Lexicon

GRAV'EL, n. [Fr. gravelle, gravier; Arm. grevell, or maen-gravell, (stone gravel); Ger. grober sand, coarse sand; D. graveel. Probably from rubbing, grating. See Grave, the verb.]

1. Small stones or fragments of stone, or very small pebbles, larger than the particles of sand, but often intermixed with them.
2. In medicine, small calculous concretions in the kidneys and bladder. Cyc.