lambrequin
Concise Oxford English Dictionary © 2008 Oxford University Press:
lambrequin /ˈlambrɪkɪn/
▶noun
- 1 N. Amer. a short piece of drapery hung over the top of a door or window or draped from a mantelpiece.
- 2 a cloth covering the back of a medieval knight's helmet, represented in heraldry as the mantling.
– origin C18: from Fr., from Du. dimin. of lamper ‘veil’.
'lambrequin' also found in these Oxford entries:

