Coussinet \Cous"si*net`\ (k??s"s?-n?t`), n. [F., dim. of coussin
cushion. See {Cushionet}.] (Arch.)
(a) A stone placed on the impost of a pier for receiving the
first stone of an arch.
(b) That part of the Ionic capital between the abacus and
quarter round, which forms the volute. --Gwilt.
[1913 Webster]