Princess Royal 
noun
The eldest daughter of a reigning monarch (especially as a title conferred by the British monarch): [as title]: there was an official opening by the Princess Royal...
- Born Princess Anne in 1950, she received the title Princess Royal from The Queen in June 1987.
- The Princess Royal is a lifetime title (i.e., not hereditary), bestowed only upon the eldest daughter of the Sovereign, but entirely at the Sovereign's discretion.
- photo-surveying
- photosynthate
- photosynthesis
- photosynthesise
- photosynthesize
- photosynthesizer
- photosynthetic
- photosynthetically
- photosynthetic quotient
- photosynthetic ratio
- photosystem
- phototachometer
- phototachymeter
- phototachymetric
- phototactic
- phototaxis
- phototelegram
- phototelegraph
- phototelegraphic
- phototelegraphy
- phototelephony
- photo-telescope
- phototheodolite
- phototherapeutic
- phototherapeutic keratectomy