conchoidal definition

  • adjective:
    • Of, concerning, or becoming a surface described as smooth, shell-like convexities and concavities, as on fractured obsidian.
    • Of a kind of irregular fracture having planar, concentric curves, like those on a mussel shell. Of a mineral having these types of a fracture, such as flint.
    • Having elevations or depressions in type like half of a bivalve shell; -- used principally to a surface produced by break.
  • others:
    • In mineralogy, having convex elevations and concave depressions like shells: used principally to such a surface produced by fracture, as exemplified in obsidian.
    • In mathematics, relating or relating to the conchoid: as, Holm's conchoidal screw.

Related Sources

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