conchoidal
noting a shell-like fracture form produced on certain minerals by a blow.
Origin of conchoidal
1Other words from conchoidal
- con·choi·dal·ly, adverb
- sub·con·choi·dal, adjective
Words Nearby conchoidal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use conchoidal in a sentence
Very compact and fine-grained reddish granular quartz, with a glistening lustre, and flat conchoidal fracture.
I am told conchoidal white lime-stone meets it on both the east and west sides.
The Book of Curiosities | I. PlattsIn the form of translucent fragments, with a highly conchoidal fracture, among the debris of the shores of Lake Pepin.
Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820 | Henry Rowe SchoolcraftAt ordinary temperatures ebonite is hard and brittle and breaks with a well-marked conchoidal fracture.
On Laboratory Arts | Richard ThrelfallThe fracture of this fossil is perfectly conchoidal, sometimes glossy, and sometimes dull on the surface.
A Dictionary of Arts, Manufactures and Mines | Andrew Ure
British Dictionary definitions for conchoidal
/ (kɒŋˈkɔɪdəl) /
(of the fracture of minerals and rocks) having smooth shell-shaped convex and concave surfaces
(of minerals and rocks, such as flint) having such a fracture
Derived forms of conchoidal
- conchoidally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for conchoidal
[ kŏng-koid′l ]
Of or relating to a mineral or rock surface that is characterized by smooth, shell-like curves. Obsidian and quartz often have conchoidal fractures.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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