כִּרְכֵּב, (redupl. of כרב, v. כְּרוּב) to round off, to make a rim by hollowing out the centre (as on a mechanic’s stool, a pot-lid &c.). Ḥull. 25ᵃ bot. unfinished wooden vessels שעתיד … לכַרְכֵּב which require polishing … or caving out; Tosef. Kel. B. Mets. II, 17 כרכב (read לכ׳). Ib. 10 (of metal ware) לכרכב; Ḥull. 25ᵇ לכַרְכֵּר (Ar. לכרכם).