资料来源 : pyDict

贝壳状的

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

Conchoidal \Con*choid"al\, a. [Cf. F. concho["i]dal.] (Min.)
   Having elevations or depressions in form like one half of a
   bivalve shell; -- applied principally to a surface produced
   by fracture.