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Webster 1913 Edition

(k??s′s?-n?tˊ)

Noun.

[F., dim. of

coussin cushion

. See

(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.

coussinet ‎(plural coussinets)

(architecture) A stone placed on the impost of a pier for receiving the first stone of an arch.
(architecture) Part of the Ionic capital between the abacus and quarter round, which forms the volute.
(Can we find and add a quotation of Gwilt to this entry?)

From coussin + -et.

coussinet m ‎(plural coussinets)