سُلَالَةٌ

What is, or becomes, drawn forth, or drawn forth gently, from, or of, a thing: (M, K:) or so سُلَالَةُ شَىْءٍ: (S:) [an extract of a thing: and hence,] the clear, or pure, part, or the choice, best, or most excellent, part [of a thing]; (Mgh; and Ksh and Bd and Jel in xxiii. 12;) because drawn from the thick, or turbid, particle (Mgh.) It is said in the Qur'an, 23:12, وَلَقَدْ خَلَقْنَا الْإِنْسَانَ مِنْ سُلَالَةٍ مِنْ طِينٍ, meaning [And verily we created man from] what was drawn forth from every kind of dust, or earth: (Fr, TA:) or from a pure, or choice, or most excellent, sort of earth or clay. (Ksh, Bd, Jel.)

And [hence,] The sperma genitalis of a man, or human being; (S, TA;) what is drawn from the صُلْب [apparently here meaning loins] of the man and from the تَرَايءِب [plural of تَرِيبَة, q. v.,] of the woman: (AHeyth, TA:) the water (مَاء) that is drawn from the back. ('Ikrimeh, TA.)

See also سَليلٌ, second sentence, in two places.