M / mĕsŏmăcros
noun greek

mĕsŏmăcros

gen. i · gender masculine · decl. 2nd
= μεσόμακρος (sc. pes)
a poetical foot of five syllables; of which only the middle one is long
a poetical foot of five syllables, of which only the middle one is long (e. g. avidissimus; opp. mesobrachys), Diom. p. 478 P.