عَجْسٌ

and ↓ عُجْسٌ and ↓ عِجْسٌ The handle, or part that is grasped by the hand, of a bow; (S, O, K, TA;) which is the part, thereof, that is the place of the arrow; as AHn says, the thickest place therein; (TA;) as also ↓ مَعْجِسٌ [lit. the place of grasping]. (S, O, K.)

And, (K,) or the first of these words, (S, O,) A portion of the middle of the night; (S, O, K;) as though from the عَجْس of the bow; [whence] one says, مَضَى عَجْسٌ مِنَ اللَّيْلِ [A portion of the middle of the night passed]: (S, O:) or the last part of the night: (Lth, O, K:) or the blackness of the night &c. (TA.) [See also عُجْسَةٌ.]

And see أَعْجَسُ.