from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, relating to, or being a surface characterized by smooth, shell-like convexities and concavities, as on fractured obsidian.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of a type of irregular fracture having planar, concentric curves, like those on a mussel shell. Of a mineral having such a fracture, such as flint.
from the GNU version of the Collaborative International Dictionary of English
- adj. Having elevations or depressions in form like one half of a bivalve shell; -- applied principally to a surface produced by fracture.
from The Century Dictionary and Cyclopedia
- In mineralogy, having convex elevations and concave depressions like shells: applied principally to such a surface produced by fracture, as exemplified in obsidian.
- In mathematics, pertaining or relating to the conchoid: as, Holm's conchoidal screw.
This is referred to as conchoidal fracture; glass fractures in the same way.
When someone breaks a window the glass shatters in a series of conchoidal breaks—curved fracture lines.
The conchoidal fractures began on the clean side of the glass and ended on the dirty side.
When someone breaks a window the glass shatters in a series of conchoidal breaks — curved fracture lines.
This one can see by the traces of conchoidal fracture which they all show.
There were built-up fabrics, called _Charlottes_, caky externally, pulpy within; there were also _marangs_, and likewise custards, -- some of the indolent-fluid sort, others firm, in which every stroke of the teaspoon left a smooth, conchoidal surface like the fracture of chalcedony, with here and there
At ordinary temperatures ebonite is hard and brittle and breaks with a well-marked conchoidal fracture.
The twigs soon become encrusted with a mammelated substance of a red colour more or less deep, nearly transparent, hard, and having a brilliant conchoidal fracture.
The white flakes do not exhibit the true conchoidal fracture in such perfection elsewhere; nor break off in such delicious morsels, edged with delicate brown.
Gilsonite or Uintahite — A brittle variety of asphalt, lustrous black in color, with a conchoidal fracture.