CONCHOIDAL

Etymology

Adjective

conchoidal (comparative more conchoidal, superlative most conchoidal)

(mathematics) Of or pertaining to a conchoid; that may be defined as a conchoid.

(mineralogy, of a fracture) Irregular, with planar, concentric curves, similar to those on a mussel shell.

(mineralogy, of a mineral) That fractures with planar concentric curves (e.g, as flint, chert or obsidian).

Anagrams

• chalconoid

Source: Wiktionary

Con*choid"al, a. Etym: [Cf. F. conchoïdal.] (Min.)

Definition: Having elevations or depressions in form like one half of a bivalve shell; -- applied principally to a surface produced by fracture.

Source: Webster’s Unabridged Dictionary 1913 Edition

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