pencel
A small pennon; a little banner, flag, or streamer.
historical
[…] forty trumpet banners of sarsenet; seven hundred and forty pensills; three hundred and fifty pensills of tarter; four standards of sarsenet with boars; […]
A lady's favour or token as worn by a knight.
obsolete
A knight carrying a pennon.
obsolete, rare
Where it comes from
From Anglo-Norman pencel, reduced form of penuncel. See pennoncel. By surface analysis, pen + Old French -cel.
Adapted from the Wiktionary entry pencel (CC BY-SA 4.0).