Arthrium: Coleoptera; the minute, concealed tarsal joint in pseudotetramera and trimera.
Arthroderm: the outer skin or covering of articulates.
Arthrodial: an articulation that permits motion in any direction.
Arthromere: a body segment or ring: = somite.
Arthropleure: the side piece of an arthromere.
Arthropods: all those articulates having jointed legs.
Article: a joint or segment.
Articular pan: the cup or dish-like depression forming the socket into which an articulation is fitted.
Articulate: that branch of the animal kingdom whose members are made up of rings, segments or articulations.
Articulate: divided into joints or segments.