ETYM Dutch groef, groeve; akin to Eng. grove. Related to Grove.
1. A long narrow furrow or channel cut by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record).
2. (Anatomy) Any furrow or channel on a bodily structure or part.

ETYM Latin, a furrow, channel, hollow.
Any of a number of tiny parallel grooves such as: the scratches left by a glacier on rocks or the streaks or ridges in muscle tissue; SYN. striation.
Line; small groove; flute of column; scratch; band; stripe.