conchoidal

(redirected from conchoidally)
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con·choi·dal

(kon-koy'dăl),
Shaped like a shell; having alternate convexities and concavities on the surface.
[concha + G. eidos, appearance]

conchoidal

(kŏng-koy′dăl) [″ + eidos, form, shape]
Shell-shaped.

con·choi·dal

(kŏn-koydăl)
Shaped like a shell; having alternate convexities and concavities on the surface.
[concha + G. eidos, appearance]
References in periodicals archive ?
These types of raw materials do not have the cleavage of schist, are homogeneous in nature, flake conchoidally and are both generally hard and durable.
Choices were also being made to focus on particular raw materials within the Ivane, with the assemblage dominated by the greenschists, metagreywacke and metabasalts to produce the larger tools of axes and waisted tools, and the conchoidally fracturing siliceous materials of quartz and baked siliceous metasediment to produce small flaked implements.
The flake produced by a bending fracture tears away from the core behind the point of impact, whereas on a conchoidally produced flake, the platform lies between the point of impact and the dorsal surface of the flake.