articulamentum
noun
ar·tic·u·la·men·tum
ärˌtikyələˈmentəm
plural articulamenta
-tə
: the inner layer of a plate of a chiton projecting anteriorly and articulating with the plate in front compare tegumentum
Word History
Etymology
New Latin, from Latin, articulation of the limbs, joint, from articulare to divide into joints + -mentum -ment