כָּשׁוּת f. (cmp. כִּישָׁא) 1) tuft, pubescence, fine hairs or fibres. Ukts. II, 1. Mikv. IX, 4 כ׳ של קטן the downy hair growth of a youth before puberty; Tosef. ib. VI, 10 כ׳ של נדיל וכ׳ quot. by R. S. to Mikv. l. c. (ed. כתות) the hair growth of one entering on puberty, about which he cares not.—Esp. (also masc. sub. שער) cuscuta, a parasite growing on shrubs (v. Löw Pfl. p. 230, sq.). Tosef. Kil. I, 11 (Var. קשות), v. הִיזְמָא. Ib. III, 16 כ׳ אינו וכ׳ ed. Zuck. (oth. ed. אין); Sabb. 139ᵃ Ms. M. (ed. כישות), v. כִּלְאַיִם. —2) (collect. noun, sub. מיני) cucumbers or melons in an early stage when they are pubescent. Ib. 109ᵃ כ׳ אין בהם משום רפואה pubescent cucumbers or melons are not considered medicinal (in Sabbath law). Ib. כל מיני כ׳ שרו וכ׳ (Ms. O. כישות, Ar. s. v. טרז: קִישׁוּת or קִישׁוֹת q. v.) all kinds of downy plants are permitted (on the Sabbath as not medicinal), except t’ruza, v. טְרוּזָא.