The word 'p' seems to be a typographical error or an incomplete word, as it does not have a specific meaning in English. If you intended to ask about a different word, please clarify. However, considering possibilities, it may represent the letter 'P', which could stand for various terms in different contexts, such as "power," "pressure," or even "point."
The letter 'P' comes from the Greek letter "pi" (Π, π) and has its roots in the Phoenician letter "pe" (𐤐) which means "mouth." In various disciplines, it has been used to denote specific concepts or units.