The Collaborative International Dictionary
Mascle \Mas"cle\ (m[a^]s"k'l), n. [OF. mascle, F. macle, L. macula spot, mesh of a net, LL. macula, macla, mascla a scale of a coat of mail. See Mail armor.] (Her.) A lozenge voided.
Wiktionary
n. 1 (lb en historical) A lozenge-shaped piece of metal, used in making scale-mail armour. 2 (context heraldiccharge English) A lozenge with a smaller lozenge-shaped hole in the centre.
Usage examples of "mascle".
It was mostly baroque and tortoiseshell but a polished shield with a blue mascle on argent hung on the far wall, with arrows splayed behind.
Mark is an admirable beast in a suit of green-and-red chain armour in the form of mascles or lozenges.
Heralds have not omitted this order or imitation thereof, while they Symbollically adorn their Scuchions with Mascles, Fusils, and Saltyrs, and while they dispose the figures of Ermins, and vaired coats in this Quincuncial method.