كَثَأَ, aor. ـَ {يَكْثَأُ}, (AZ, Ṣ, Ḳ,) inf. n. كَثْءٌ; (Ṣ;) (as also كَثَعَ; TA;) andكثّأ↓, inf. n. تَكْثِئَةٌ; (Ṣ, L, Ḳ;) It (the milk) rose above the water, and the latter became clear beneath it: (AZ, Ṣ, Ḳ;) it (the milk) became thick, or coagulated, and its oily matter floated upon its surface. (TA.)

كَثَأَتِ القِدْرُ, (Ṣ, Ḳ,) inf. n. كَثْءٌ, (Ṣ,) The pot frothed, or raised a scum, in boiling. (AZ, Ṣ, Ḳ.)

كَثَأَ القِدْرَ He skimmed the pot. (Ḳ.)

كَثَأَ, (Ḳ,) inf. n. كَثْءٌ; (TA;) andكثّأ↓, inf. n. تَكْثِئَةٌ; (Ḳ;) It (a plant, Ṣ, Ḳ, and the soft kind of hair called وَبَر, Ṣ) grew forth, or became dense and thick and long: (Ḳ:) it (standing corn, &c.) became thick and tangled. (TA.)

كَثَأَتِ اللِّحْيَةُ, andكثّأت↓, andكَنْثَأَت↓, (Ḳ,) or, accord. to some, كنتأت, (TA,) The beard became long and large (Ḳ.)

كثّأ, inf. n. تَكْثِىْءٌ, He ate what is called كَثْأَة, (Ḳ,) i. e. what is on the top of milk. (Ṣ, TA.)

And see 1 in three places.

كَثْءٌ A kind of أَقِط; what rises (from the milk) above the water, the latter becoming clear beneath it; or what becomes thick, or coagulated, its oily matter floating upon the surface, (يَكْثَأُ,) in the pot, and is poured out; the upper part whereof is gross, or thick. So says AḤát; and he adds, What is termed مصرع [evidently, I think, a mistranscription for مُضَرِّعٌ,] is what becomes thick, or coagulated, and almost thoroughly cooked: عاقد is that of which the water has gone, and which is thoroughly cooked: كَرِيص is that which is cooked with نَهْق or حَمَصِيص: مَصْل is a kind of اقط cooked again: and ثَوْر is a great piece of it. (TA.)

كَثْأَةٌ and كَثْأَةٌ (like كثعة, TA) Oily scum, or floating curd, of milk; or what floats above the water: (Ṣ, Ḳ, TA:) scum of a pot, after boiling. (TA.)

خُذْ كَثأةَ قِدْرِكَ Take the scum of thy pot. (Ṣ.) [See 2.]

كَثْأَةٌ and كَثَاةٌ (Ḳ) The leek, syn. كُرَّاث: or, as some say, the wild carrot, syn. حِنْزَاب: (TA:) or the rocket, syn. جِرْجِير: (Ḳ:) or, accord. to AM, the seed of that plant: (TA:) or wild rocket, syn. جِرْجِير بَرِّىّ; (Ḳ;) not that which is cultivated in gardens. (TA.) Aboo-Málik says, that it is also called نَهْق. (TA.) [See also كَتْأَة.]

لِحْيَةٌ كَنْثَأَةٌ A long and large beard. (TA.)

كَنْثَأُ اللِّحْيَةِ Having a long and large beard. (TA.)

كِنْثَأْوٌ i. q. كِنْتَأْوٌ, [q. v. in art. كتأ]. (Ḳ.)