Rĕn'net1, n.
n. [A-S. gerinnan, to curdle or coagulate, from rinnan, rennan, to run, O. H. Ger. girinnan, to curdle, N. H. Ger. gerinnen, Goth. garinnan, O. D. runnen, rennen, rinnen, to run, drop, coagulate, run-sel, ren-sel, rin-sel, coagulum.] The inner membrane of the fourth stomach of the calf, or an infusion or preparation of it, used for coagulating milk. [Written also runnet.]