مُسْتَطِيلٌ

الفَجْرُ المُسْتَطِيلُ is The first dawn; also called the false; and termed ذَنَبُ السِّرْحَانِ [the tail of the wolf], because it appears rising without extending laterally: (Msb:) opposed to المُسْتَطِيرُ. (TA in article طير.)