سُكَاكٌ

The air that is next to the clouds, or to the higher part, (عَنَان,) of the sky; as also ↓ سُكَاكَةٌ: (S, K:) or both signify the air, or atmosphere, between heaven and earth: like لُوحٌ: the plural of the second is سَكَايءِكُ. (TA.) Hence the saying, لَا أَفْعَلُ ذٰلِكَ وَلَو نَزَوَْتَ فِىالسُّكَاكِ, meaning [I will not do that even if thou leap] into the sky. (S.)

Also The part, of an arrow, which is the place of the feathers. (Ibn- 'Abbád, O, K.)