crossette

or croi·sette, cros·ette

[ kraw-set, kro- ]
/ krɔˈsɛt, krɒ- /

noun Architecture.

a projection at a corner of a door or window architrave.
Also called dog-ear, dog's-ear, elbow.

Origin of crossette

1720–30; < French, diminutive of crosse. See crosse, -ette