Overview
The Brihat Parashara Hora Shastra (Sanskrit: बृहत् पराशर होरा शास्त्र; IAST: ; abbreviated to BPHS) is the most comprehensive extant Śāstra on Vedic natal astrology, in particular the Horā branch (predictive astrology, e.g. horoscopes). Though ascribed to Maharṣi Parāśara, the origin and date of the original composition is unknown. The most popular version of the BPHS consists of 97 chapters, a 1984 translation by R. Santhanam.
Nomenclature
'bṛhat parāśara horā śāstra' (बृहत् पराशर होरा शास्त्र) can be loosely translated to examples such as 'the great book on horoscopy by Parashara' or 'Great Parashara's manual on Horoscopic astrology':
'bṛhat' (बृहत्) means 'great, large, wide, vast, abundant, compact, solid, massy, strong, mighty' or 'full-grown, old' or 'extended or bright (as a luminous body)' or 'clear, loud (said of sounds)'.
'parāśara' (पराशर) is the name of a Vedic Maharishi ('great Rishi')
'horā' (होरा) means 'horoscope or horoscopy'; also means "hour" or "time", from Greek(ώρα).
'śāstra' (शास्त्र) means 'compendium', 'book', 'manual', 'rule', 'instruction', 'science', and 'advice'.
Summary
From Wikipedia (CC BY-SA 4.0).