Capital Greek omicron with a grave accent sloping down to the right, used in polytonic Greek.
U+1FF7GREEK SMALL LETTER OMEGA WITH PERISPOMENI AND YPOGEGRAMMENIU+1FF9GREEK CAPITAL LETTER OMICRON WITH OXIAU+1FF6GREEK SMALL LETTER OMEGA WITH PERISPOMENIU+1FFAGREEK CAPITAL LETTER OMEGA WITH VARIAU+1FFBGREEK CAPITAL LETTER OMEGA WITH OXIAU+1FF4GREEK SMALL LETTER OMEGA WITH OXIA AND YPOGEGRAMMENIU+1FFCGREEK CAPITAL LETTER OMEGA WITH PROSGEGRAMMENIU+1FF3GREEK SMALL LETTER OMEGA WITH YPOGEGRAMMENIU+1FFDGREEK OXIAU+1FF2GREEK SMALL LETTER OMEGA WITH VARIA AND YPOGEGRAMMENIU+1FFEGREEK DASIAU+1FEFGREEK VARIA233 characters in the Greek Extended Unicode block, from number 227.