Tomentum

·noun The closely matted hair or downy nap covering the leaves or stems of some plants.

tomentum
tōmentum, i, n., a stuffing for cushions (e. g. of wool. hair, feathers, straw, etc.), cushioning ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
tomentum
tomentum i, n a stuffing, filling (for cushions), Ta. ...

An Elementary Latin Dictionary