M / mĕtăcismus
noun greek

mĕtăcismus

gen. mĕtăcismi · gender masculine · decl. 2nd
for mytacismus, = μυτακισμός, from μῦ
a frequent repetition of the letter; the pronunciation of; at the close of a word before a word beginning with a vowel, metacism
a frequent repetition of the letter M, Mart. Cap. 5, § 514; also the pronunciation of M at the close of a word before a word beginning with a vowel, metacism, Diom. p. 448 P.