mascle
noun
mas·cle
ˈmaskəl
plural -s
1
heraldry : a lozenge voided
2
: a steel plate especially of lozenge shape used in series on 13th century armor
Word History
Etymology
Middle English mascle, mascule mesh, lozenge voided, from Old French macle, mascle, of Germanic origin; akin to Old High German masca mesh