The term Pacific Time (PT) is often used to denote the local time in areas observing either Pacific Standard Time (PST) or Pacific Daylight Time (PDT). In other words, in locations observing Daylight Saving Time during part of the year, Pacific Time is not static but switches between PST and PDT. PT (prothrombin time) and PTT (partial thromboplastin time) are blood tests that measure how long it takes your blood to form a clot. A normal PT is about 10 to 13 seconds, and a normal PTT is 25 to 35 seconds. What does the abbreviation PT stand for? Meaning: part. The prothrombin time (PT) test measures how quickly your blood clots, relying on a liver-produced protein called prothrombin, or clotting factor 2. This is one of 13 factors involved in coagulation, and clotting speed depends on their levels in your blood. Looking for the definition of PT? Find out what is the full meaning of PT on Abbreviations.com! 'Point' is one option -- get in to view more @ The Web's largest and most authoritative acronyms and abbreviations resource. P.T. (initialism for playable teaser ) is a 2014 interactive teaser for the video game Silent Hills, a cancelled installment in the Silent Hill series. It is a psychological horror game developed by Kojima Productions under the pseudonym 7780s Studio and published by Konami Digital Entertainment. A prothrombin time (PT) test measures how many seconds it takes for your blood to clot. Sometimes, this value gets expressed as the International Normalized Ratio (INR) instead of in seconds. This page illustrates how PT is used in messaging and chat forums, in addition to social networking software like VK, Instagram, Whatsapp, and Snapchat. From the table above, you can view all meanings of PT: some are educational terms, the other are medical terms, and even computer terms. Regardless, P.T. is back, and the native port to P.T. has already received plenty of attention online, even from Hideo Kojima himself! Below, we'll share how you can easily download. This disambiguation page lists articles associated with the title PT. If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article.