n.
Pronunciation: ' prä-th ə -s ə s
Function: noun
Inflected Form: plural -e · ses \ - ˌ s ē z \
Etymology: Late Latin, alteration of prosthesis, from Greek, literally, addition ― more at PROSTHESIS
Date: circa 1550
: the addition of a sound to the beginning of a word (as in Old French estat whence English estate from Latin status )
– pro · thet · ic \ prä- ' the-tik \ adjective