conchoidal

[ kong-koid-l ]
/ kɒŋˈkɔɪd l /

adjective Mineralogy.

noting a shell-like fracture form produced on certain minerals by a blow.

QUIZZES

DIVE INTO THIS BALMY SUMMERTIME SPELLING QUIZ

Do you often fall under the spell of the summer season? See if you can really spell your way through it with this quiz of popular summertime words.
Question 1 of 12

Origin of conchoidal

First recorded in 1660–70; conchoid + -al1

OTHER WORDS FROM conchoidal

con·choi·dal·ly, adverbsub·con·choi·dal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for conchoidal

British Dictionary definitions for conchoidal

conchoidal
/ (kɒŋˈkɔɪdəl) /

adjective

(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

conchoidal
[ kŏng-koidl ]

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.