Definify.com
Webster 1913 Edition
Topknot
Top′knotˊ
,Noun.
1.
A crest or knot of feathers upon the head or top, as of a bird; also, an ornamental knot worn on top of the head, as by women.
A great, stout servant girl, with cheeks as red as her
topknot
. Sir W. Scott.
2.
(Zool.)
A small Europen flounder (
Rhoumbus punctatus
). The name is also applied to allied species.