"P.a." Natural Recordings by Native Speakers
P.A. is an abbreviation for "Public Address". However, in modern usage, it is often used to refer to a Personal Assistant, which is a person who provides administrative support to an individual, such as a celebrity, executive, or high-net-worth individual.
Ozonoscopic is a rare or obsolete term that refers to a device or instrument used to measure or detect ozone. It is essentially a tool designed to record the intensity of ozone in the atmosphere. The word is a combination of "ozon" meaning ozone and "scopic" meaning relating to or used for viewing or examining, suggesting that the instrument was used to visualize or measure the presence of ozone.
The ozonosphere is a region of the Earth's atmosphere that extends from about 15 to 30 kilometers (9 to 19 miles) above the Earth's surface. It is the layer of the atmosphere where ozone (O3) is most concentrated, and it plays a crucial role in protecting the planet from harmful ultraviolet (UV) radiation from the sun. The ozonosphere contains a concentration of ozone molecules that absorbs UV radiation, preventing it from reaching the Earth's surface and potentially causing harm to living organisms.
A colloquial term used to refer to Australian people or Australians in general, similar to how "Yanks" refers to Americans.
P.H.D. stands for Doctor of Philosophy, which is a highest academic degree awarded to students who have completed original research in a specific field of study, typically in the humanities, social sciences, or sciences.
Parent-Teacher Association (PTA) is a group of parents and teachers who work together to promote the interests of the school and its students.