The Collaborative International Dictionary of English v.0.48:
Reeding \Reed"ing\ (r[=e]d"[i^]ng), n. [From 4th Reed.]
1. (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: Several reedings are often placed together, parallel to
each other, either projecting from, or inserted into,
the adjoining surface. The decoration so produced is
then called, in general, reeding.
2. The nurling on the edge of a coin; -- commonly called