M / mŏnogramma
noun greek

mŏnogramma

gen. mŏnogrammătis · gender neuter · decl. 3rd
= μονόγραμμα
a character consisting of several letters, a monogram
a character consisting of several letters, a monogram (post-class.), e. g. = Christus, Paul. Nol. Carm. 26, 618.