Entertainment / Golf / Groove: (also 'score line, scoring') markings (usually horizontal and linear) etched into the face of a golf club to enhance spin direction and decrease hydroplaning (grooves come in different types based on their shape or appearance, e.g., v grooves, square or box grooves, u grooves, etc. And are regulated by the rules of golf)
Search Google for Groove:
Groove Verb Synonyms: slot, cut, channel, furrow, gouge, trough, flute, scratch, striation or stria, rifling, rifle, glyph, sulcus
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Business / Construction / T and G, Tongue And Groove: A joint made by a tongue (a rib on one edge of a board) that fits into a corresponding groove in the edge of another board to make a tight flush joint. Typically, the subfloor plywood is T & G. MORE
Science / Geology / Glacial Striations: Grooves and scratches on a bedrock surface that were produced by the movement of a glacier. The orientation of the striations gives evidence to the direction of glacial movement. MORE
Health / Fitness / Striations: Grooves or ridge marks seen under the skin, the ultimate degree of muscle definition. MORE