מָרוֹקָא I, (מָרַק) a substance used for polishing, prob. pumice (v. מָרֵקָה). B. Mets. 47ᵃ, sq. קונין במ׳ (Ar. ed. Koh. במרקא) you may take vicarious possession with a vessel made of maroḳa (although it is too brittle for practical use; Tosaf.: ‘date-stones used for smoothing parchment’; Rashi: ‘a vessel made of baked ordure’, v. גָּלָל). Ib. מוריקא ed. (Ms. M. מרוקא, v. Rabb. D. S. a. l. note).