"Pliohippus" Natural Recordings by Native Speakers
Plihippus is an extinct genus of early three-toed perissodactyl mammals that lived from around 57 to 36 million years ago. It belongs to the family Miohippidae. The name is derived from the Greek words "pleion" (more) and "hippos" (horse).
I couldn't find any word that starts with "ploce". However, it's possible that you may be thinking of "pole" or a word from another language. Could you provide more context or information about the word you are looking for?