Pûrva Mîmânsâ, du sanskrit.
[from purva prior + mimansa profound or striving thought or meditation from the verbal root man to think] Inquiry into the first portion of the Veda -- the matra portion; the fifth of the six Darsanas or schools of Hindu philosophy. The school of philosophy in our days considered to be chiefly concerned with the correct interpretation of the Vedic texts; hence sometimes called the First Vedantic School. Jaimini is reputed to be its founder, as well as the author of the Mimansa-darsana, the sutras or aphorisms which constitute its chief doctrinal authority. This school is also sometimes termed Karma-mimansa because of the doctrine advocated that by its teaching one can be more or less freed from the making of new karma.
The more advanced portion of the Mimansa is called the Vedanta, which is the present-day theosophy of Hindustan. The Vedanta, also called the Uttara-mimansa, is attributed to Vyasa, the arranger of the Vedas, as its founder.
(source : "Encyclopedic Theosophical Glossary", traduction d'Esopedia)