Conchoidal

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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.
     [1913 Webster]