(noun; Latin diminutive artus
, joint): 1. A distinct segment or jointed part or structure
2. (Arthropoda) a. In Chelicerata, the serrated process on the chelicera of a tick. b. In Crustacea, a subdivision of the antennal or antennular flagella or appendage. c. In Insecta, a segment of a leg
See also: segment.