Ap'pa-rā'tus or ĂP/PA-RĀ'TUS or ĂP/PA-RĀ'-TUS-ES, n.

noun

n.; pl. ĂP/PA-RĀ'TUS or ĂP/PA-RĀ'-TUS-ES. [Lat. apparatus, from apparare, to prepare, from ad and parare, to make ready; O. Eng. apparate, Fr. apparat, Pr. aparat.]

Things provided as means to some end, especially a full collection or set of implements, or utensils, for performing scientific experiments or operations.
(Physiol.) A collection of organs all of which concur in a common function; as, the respiratory apparatus. Dunglison.
(Surg.) The different modes of operating for the stone in the bladder. Dunglison.