ردج1 رَدَجَ, aor. ـِ inf. n. رَدْجٌ, He (a mare's foal  [or a young ass, or a lamb or kid, or any young solid-hoofed animal only,]) voided the excrement termed رَدَج. (TA.) A2:  رَدَجَ, inf. n. رَدَجَانٌ, i. q.  دَرَجَ, inf. n. دَرَجَانٌ: (K:) one of these is formed by transposition from the other: or, accord. to IJ, each is an original word. (TA.) رَدَجٌ What comes forth, (S, K,) or what first comes forth, (TA,) from the belly of a lamb or kid, or of a mare's foal, (S, K, TA,) and of a young mule, and of a young ass, (TA,) or of any young solid-hoofed animal only, (Az, T, TA,) before it eats: like عِقْىٌ in relation to a child: (S, K:) pl. أَرْدَاجٌ. (TA.) أَرْدَاجٌ pl. of رَدَجٌ: (TA:) A2:  and used by Ru-beh for أَرَنْدَج, q. v. (K.) أَرَنْدَجٌ (Lh, S, K) and إِرَنْدَجٌ (K) and ↓ يَرَنْدَجٌ (Lh, S) Black skin [or leather], (S, K,) of which boots are made: termed by Ru-beh, in the following hemistich, ↓ أَرْدَاج: كَأَنَّمَا سُرْوِلْنَ فِى الأَرْدَاجِ [As though they were clad in trousers of ارندج]: (K:) accord. to A' Obeyd, originally Pers\., (S,) arabicized, (K,) from رَنْدَهْ: (S, K:) one should not say رَنْدَجٌ: (ISk, S:) accord. to Lh, i. q.  دَارِشٌ: or, he adds, as some say, a skin [or leather] different from that termed دارش: or i. q.  زَاجٌ, with which one blackens. (TA. [See what follows.]) With respect to these words of a poet, describing a woman as ignorant, or inexperienced, قَبْلَهَا ↓ لَمْ تَدْرِ مَا نَسْجُ اليَرَنْدَجِ [She knew not what is the weaving of يرندج before it], it is said that he imagined يرندج to be woven, or that he meant that this woman, by reason of her ignorance, or inexperience, imagined it to be so. (TA.) b2:  [It is said, app. on the ground of an assertion mentioned above, that]↓ يَرَنْدَجٌ also signifies A certain black dye; (L;) the black [or blacking] with which boots are blacked: or زَاجٌ [i. e. vitriol]. (K.) b3: Az mentions ارندج and ↓ يرندج as quadriliteral-radical  words. (TA.) يَرَنْدَجٌ: see the next preceding paragraph, in four places.