P / prosthĕsis
noun

prosthĕsis

gen. prosthĕsis · gender feminine · decl. 3rd
= πρόσθεσις, and , , , = πρόθεσις
a grammatical figure consisting in the prefixing of a letter; syllable to a word; prosthesis;
a grammatical figure consisting in the prefixing of a letter or syllable to a word, prosthesis; as gnatus for natus, tetuli for tuli, Charis. 4; Diom. 2.