[UN-1 4 b.] Evil grain; ‘wild oats.’

1

1513.  Douglas, Æneid, IV. Prol. 13. Quhar schame is lost, thait … Ripis ȝour perellus frutis and oncorn.

2

1710.  Ruddiman, Gloss. Douglas’ Æneis, s.v., In some places of Scotland they say, that one hath sown his uncorn.

3