M / mĕtăphrĕnum
noun greek

mĕtăphrĕnum

gen. mĕtăphrĕni · gender neuter · decl. 2nd
= μετάφρενον
the upper part of the spine
the upper part of the spine, Cael. Aur. Acut. 3, 16, 129 (as Greek, id. ib. 2, 29, 151; id. Tard. 3, 2, 31).