from
Bouvier's Law Dictionary, Revised 6th Ed (1856)
LOCATIO OPERIS, contracts. A term used in the civil law, to signify the
hiring of labor and services. It is a contract by which one of the parties
gives a certain work to be performed by the other, who binds himself to do
it for the price agreed between them, which he who gives the work to be done
promises to pay to the other for doing it. Poth. Louage, n. 392. This is
divided into two branches, first, Locatio operis faciendi; and, secondly,
Locatio mercium vehendarum. See these words.