ثَبَجٌ

The part between the كَاهِل [apparently here signifying the base of the neck] and the back: (S, A, Msb, K:) or the circuit of the upper part of the كاهل, extending to the breast; as is shown by the phrase أَثْبَاجُ القَطَا: [see what follows:] (Aboo-Málik, TA:) or the part between the shoulderblades and the كاهل: and the main part of the back, and the part in which are the places of curvature of the ribs: or the part between the buttocks and the base of the neck: according to AO, the part from the rump-bone, or root of the tail, to the hair of the withers [of a horse]: (TA:) also the breast of the bird called القَطَا: (K:) or the middle part of that bird: plural أَثْبَاجٌ. (A, TA.)

(assumed tropical:) The middle (S, K) of a thing, (K,) of anything: (S:) and the main part thereof; (K;) so of a heap, or tract, of sand: (A'Obeyd, S:) and the higher, or highest, part of a thing: plural [of pauc.] أَثْبَاجٌ and [of mult.] ثُبُوجٌ. (TA.) (tropical:) The middle of the sea: the main part thereof; and of the night: (A, * TA:) the height of the middle of the sea, where the waves meet one another: the higher, or highest, parts of the waves. (TA.) مِنْ ثَبَجِ المُسْلِمِينَ (assumed tropical:) Of the middle class of the Muslims: or of the higher, or highest, or chief, class of them. (TA from a tradition)

The quality denoted by the epithet أَثْبَجُ, q. v.; as also ثَبَجَةٌ. (L.)

Incongruity and confusion of speech, or language: and obscurity, or indistinctness, of handwriting. (K. [App. a verbal noun: see 2, last sentence.])