资料来源 : pyDict

近似轮状[环状] 的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Penannular \Pen*an"nu*lar\, a. [L. pene, paene, almost + E.
   annular.]
   Nearly annular; having nearly the form of a ring.
   ``Penannular relics.'' --D. Wilson.