Vakka2 (nt.) [Vedic vṛkka] the kidney Sn 195; Kh iii.; Miln 26; DhsA 140. In detail described as one of the 32 ākāras at Vism 255, 356; VbhA 60, 239, 356.

 -- pañcaka the series of five (constituents of the body) beginning with the kidney. These are vakka, hadaya, yakana, kilomaka, pihaka: VbhA 249.