כְּכָי, (= כיכי, √כו, cmp. כַּוָּא) [small apertures, meshes,] spiderweb; trnsf. the web-like marrow of reeds. Ohol. XIII, 5 כ׳ שיש בה ממש substantial spiderweb; [oth. opin.:] substantial reed marrow. Kel. XVII, 17 עד שיוציא את כל הכ׳ (Var. כבאי, read כְּכַאי) until he has taken out the entire marrow; Tosef. Kel. B. Mets. VII, 12 כ׳ quoted by R. s. to Kel. l. c. (ed. זָכָר).