Any of several hairlike substances obtained from plants; especially the fibre of the leaves of the European palm Chamaerops humilis, and vegetable hair made from Spanish moss.
Origin
Mid 19th century.
Definition of vegetable horsehair in US English:
vegetable horsehair
noun
Any of several hairlike substances obtained from plants; especially the fibre of the leaves of the European palm Chamaerops humilis, and vegetable hair made from Spanish moss.