nebuly
Concise Oxford English Dictionary © 2008 Oxford University Press:
nebuly /ˈnɛbjʊli/
▶adjective Heraldry divided or edged with a line formed of deeply interlocking curves.
– origin C16: from Fr. nébulé, from med. L. nebulatus ‘clouded’, from L. nebula ‘mist’.
'nebuly' also found in these Oxford entries:

