Word origin
[1925–30; ‹ F: orig., the fillet below an ovolo, projecting part of a cornice; hence,with the common sense “what protrudes,” prob. deriv. of
moucher to cut or knock off (something protruding) (
see -ette), appar. extended sense of
moucher to wipe (a person's) nose ‹ VL *
muccāre, deriv. of L
muccus, mūcus mucus]