hatchment

Etymology

From Middle French hachement, a modification of Old French acesmement (“adornment”) (related to Italian accismare); not, as is often claimed, an alteration of achievement.

noun

1. (heraldry) A display of the arms, supporters, crests, motto, etc of a deceased person, placed within a black lozenge and hung on a wall
   The second and third quarters of the shield are indecipherable on the stone but clearer in two other representations of the arms, a painted wooden funeral hatchment for Mary Davie[…] 8 October 2012, Daniel W. Patterson, The True Image: Gravestone Art and the Culture of Scotch Irish Settlers in the Pennsylvania and Carolina Backcountry, UNC Press Books, page 141