Small semicircular grooves on a column

• Grooves on a coin's edge
• Quarter grooves
• Small round molding
• Lines on the edge of quarters

Wiktionary Word definitions in Wiktionary
n. 1 Decorative moulding of parallel strips that resemble reeds. 2 Milling on the edge of a coin. vb. (present participle of reed English)

Wikipedia Word definitions in Wikipedia
Reeding is a technique wherein "reeds" are carved or milled into a surface.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Reeding \Reed"ing\ (r[=e]d"[i^]ng), n. [From 4th Reed .] (Arch.) A small convex molding; a reed (see Illust. (i) of Molding ); one of several set close together to decorate a surface; also, decoration by means of reedings; -- the reverse of fluting . Note: ...