frenum
fre.num \'fre--n*m\ \-n*\ n or frenums or fre.na [L, lit., bridle; akin to L firmus firm] pl : a connecting fold of membrane serving to support or restrain
fre.num \'fre--n*m\ \-n*\ n or frenums or fre.na [L, lit., bridle; akin to L firmus firm] pl : a connecting fold of membrane serving to support or restrain