Clauson (1972)
An etimological dictionary of pre-thirteenth-century Turkish
p. 970
1 yarın
‘shoulder-blade’; in this form n.o.a.b. A syn. word yağrın appeared in the medieval period; it can hardly be the original form of yarın, a much older word, and may be a mispronunciation due to a supposed etymological connection w. yağır, q.v. Survives in NE Alt., Kumd., Leb., Tel. yarın R III 122; Khak., Tuv. carın; Bar. yawrun III 18: NC Kzx. jawrin: SC Uzb. yağrin: SW Tkm. ya:ğrın. See yarınla:-. Uyğ. viii ff. Man.-A (of a demon being suppressed; the west country presses down his internal organs; the north and south countries press down) yaranın başının (sic) ‘his shoulder blades and head’ (Mount Sumeru presses down his trunk(?), özin) M III 8, 3-10 (ii): Xak. xi yarın ‘aẓmu’l-katif ‘the shoulder-blade’; the Turks say about it (fīhi) yarın bulğansa: e:l bulğanu:r iḏā taşawwaşa <‘aẓmu’l-katif taşawwaşa>’l-wilāya ‘if the shoulder blade is irregular, the realm is in disorder’ Kaş. III 21 (presumably a refce. to scapulomancy of the Chinese kind): xiv Muh. muştū’l-ẓahr ‘shoulder blade’ yağrın Mel. 47, 14; Rif. 141 (MS. yağrık): Çağ. xv ff. yağrın (spelt) şāna wa katif ‘shoulder-blade, shoulder’; also called yağır and kebze San. 333r. 27; o.o. 300r. 10; 333v. 4 (yağır): Xwar. xiii yağrın ‘shoulder-blade’ ‘Ali 48: xiv ditto Nahc. 33, 11: Kıp. xiii lawḥu’l-katif ‘shoulder-blade’ yağranı (sic) Hou. 20, 10: xiv yağrın ‘aẓmu’l-katif İd. 95: xv lawḥu’l-katif yawrun Kav. 60, 17; lawḥ yağrın Tuh. 31b. 5: Osm. xiv ff. yağrın ditto; c.i.a.p. TTS I 766; II 976; III 754; IV 825.