American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Of, relating to, or being a surface characterized by smooth, shell-like convexities and concavities, as on fractured obsidian.
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.
- adj. mineralogy 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.
GNU Webster's 1913
- adj. (Min.) Having elevations or depressions in form like one half of a bivalve shell; -- applied principally to a surface produced by fracture.
- From conchoid (Wiktionary)
- From Greek konkhoeidēs, mussellike : konkho-, concho- + -oeidēs, -oid. (American Heritage® Dictionary of the English Language, Fourth Edition)
“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.”
These user-created lists contain the word ‘conchoidal’.
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List of minerals, elements, group names and geochemistry terms encountered in the science of mineralogy. I've chosen to avoid capital letters in most examples, though a great many mineral names hon...
A list of words that are odd or words that I have looked up.
very comprehensive list
of molluscs,who does not like
calamari? hmm yum
100,000 species just in molluscs
A roster of adjectives that infrequently surface in typical conversation and writing. Many are dredged from scientific or other technical jargon or sieved from examples of disused archaic forms.
(i'm a rock nerd, so what? :P)
Looking for tweets for conchoidal.