fibrous articular capsule

fibrous layer of joint capsule

[TA]
the outer fibrous part of the capsule of a synovial joint, which may in places thicken to form capsular ligaments.

fi·brous ar·tic·u·lar cap·sule

(fī'brŭs ahr-tik'yū-lăr kap'sŭl)
The outer fibrous part of the capsule of a synovial joint, which may in places be thickened to form capsular ligaments.