a term used to denote a complete set of instruments, or other utensils, belonging to any artificer or machine.

APPARATUS is frequently used for the operation of cutting for the stone. For this there are three sorts of apparatus, viz. the small, great, and high apparatus. See Surgery. Apparatus is also used as a title of several books composed in form of catalogues, bibliothecas, dictionaries, &c., for the ease and convenience of study. The apparatus to Cicero is a kind of concordance, or collection of Ciceronian phrases, &c. The apparatus facer of Possevin, is a collection of all kinds of ecclesiastical authors printed in 1611, in three volumes.—Glossaries, comments, &c. are also frequently called apparatuses.