Meaning

noun equipment designed to serve a specific function

noun (anatomy) a group of body parts that work together to perform a given function

originEtymology tree Proto-Indo-European *h₂éd Proto-Italic *ad Proto-Italic *ad- Latin ad- Proto-Indo-European *perh₃-der. Latin parō Latin apparō Proto-Indo-European *-tus Proto-Italic *-tus Latin -tus Latin apparātuslbor. English apparatus Learned borrowing from Latin apparātus. Doublet of apparat.

Etymology from Wiktionary, CC BY-SA 3.0