What is Actio Pro Socio?

Legal Definition
In the civil law, is the name of an action by which either partner could compel his co-partners to perform their social contract. Poth. Contr. de Societe, n. 134.
-- Bouviers Law Dictionary
Legal Definition
An action of partnership. An action brought by one partner against his associates to compel them to carry out the terms of the partnership agreement
-- Black's Law Dictionary
Legal Definition
A Roman law action by one partner against the others to enforce their partnership agreement.
-- Ballentine's Law Dictionary