A short subsidiary rib connecting two main ones. (Martindale, Andrew. Gothic Art, 269)
Short rib that fills spaces between tiercerons. Should be carefully differentiated from the short ribs that result from splitting major ribs such as tiercerons, diagonal ribs and transverse arches. Liernes do not pretend to be structural.
purely decorative extra vaulting ribs joining the structural ribs to form a net-like pattern
in a complex rib vault, liernes connect the keystone to the centre of the sides of the quadrilateral made by the vault. The rib from the origin of the arch to the lierne is called a tierceron. Both ribs are found solely in late Gothic architecture