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1. Separable into parts or having removable sections: a clastic anatomical model.
2. Geology Made up of fragments of preexisting rock; fragmental.

[From Greek klastos, broken; see clast.]

clas′tic n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Geological Science) (of sedimentary rock, etc) composed of fragments of pre-existing rock that have been transported some distance from their points of origin
2. (Biology) biology dividing into parts: a clastic cell.
3. (Medicine) able to be dismantled for study or observation: a clastic model of the brain.
[C19: from Greek klastos shattered, from klan to break]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈklæs tɪk)

1. composed of fragments or particles of older rocks or previously existing solid matter; fragmental.
2. pertaining to an anatomical model made up of detachable pieces.
3. Biol. breaking up into fragments or separate portions; dividing into parts.
[1870–75; < Greek klastós broken, v. adj. of klân to break + -ic]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.clastic - of or belonging to or being a rock composed of fragments of older rocks (e.g., conglomerates or sandstone)
geology - a science that deals with the history of the earth as recorded in rocks
disintegrative - tending to cause breakup into constituent elements or parts
2.clastic - capable of being taken apart; "the professor had a clastic model of the human brain"
detachable - designed to be unfastened or disconnected without damage; "shirts with detachable collars"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Geological formation around this epicenter consists of continental clastic rocks.
(One elastic end is between the pinky and nng fingers, and the opposite clastic end is between the middle and pointer fingers.) Stitch the straight finger sides only up to the end of the outward curves and not the fingers themselves.
Large volumes of clastic sediments were shed off the uplift and deposited to the north in the rapidly subsiding Anadarko Basin (Figure 2).
Camel Suspect Terrane Provenance: The angularity of silisiclastic grains of Tokerau clastic indicates a relative low amount of sediment transport from its source (Plate 1).
Atlas of Australian and New Zealand hydrocarbon seals; worldwide analogs for cap rocks and intraformational barriers in clastic depositional settings.
The prospectivity of the carbonate trend, including the Cinco prospect, and the Hawkeye turbidite clastic prospect demonstrates the high impact potential to be tested by exploration drilling in SC55," McNab added.
Sandstone is formed through inorganic and clastic processes.
The well was drilled to explore the prospects of a Mesozoic Synrift Clastic reservoir lying over 2,000 metres below the already producing reservoirs in the Dhirubhai-1 and 3 (D1 and D3) gas fields.
Sedimentary rocks of Lower Cretaceous age are well exposed in northern and central Mexico and a thick sequence of clastic and carbonate rocks belonging to the Bisbee Group is widely distributed in Sonora, northwestern Mexico.
Generally, average [rho] value of chemical sedimentary rocks (dolostone, limestone, and siliceous rocks) is higher than that of clastic sedimentary rocks (mudstone, and siltstone, sandstone).
Direct basement of the Triassic rocks is the coal-bearing clastic formation of Upper Carboniferous age, up to several thousand meter thick.
Silver-gold-lead-zinc mineralization is hosted in a sequence of Permian marine clastic sediments and limestone which are overlain by a Jurassic terrestrial sedimentary sequence and underlain by Proterozoic metasedimentary rocks.