lierne rib 穹顶枝肋
Lierne rib \Lierne" rib`\ (ly[^a]rn" r[i^]b`) n. [F. lierne.]
(Arch.)
In Gothic vaulting, any rib which does not spring from the
impost and is not a ridge rib, but passes from one boss or
intersection of the principal ribs to another.