See more synonyms for sedimentary on
Sometimes sed·i·men·tal [sed-uh-men-tl] /ˌsɛd əˈmɛn tl/.

Origin of sedimentary

First recorded in 1820–30; sediment + -ary
Related formssed·i·men·tar·i·ly [sed-uh-muh n-tair-uh-lee, sed-uh-muh n-ter-] /ˌsɛd ə mənˈtɛər ə li, ˈsɛd ə mənˌtɛr-/, adverbun·sed·i·men·tar·i·ly, adverbun·sed·i·men·ta·ry, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for sedimentary

Contemporary Examples of sedimentary

  • He kept encasing his answers in sedimentary layers of facts and assertions.

    The Daily Beast logo
    Aloof, Even in Defeat

    Howard Kurtz

    November 3, 2010

Historical Examples of sedimentary

British Dictionary definitions for sedimentary


  1. characteristic of, resembling, or containing sediment
  2. (of rocks) formed by the accumulation and consolidation of mineral and organic fragments that have been deposited by water, ice, or windCompare igneous, metamorphic
Derived Formssedimentarily, 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

Word Origin and History for sedimentary

1764, from sediment + -ary. Sedimentary rock attested by 1830 (in Lyell). Sedimental (adj.) is recorded from c.1600.

Online Etymology Dictionary, © 2010 Douglas Harper

sedimentary in Science


  1. Relating to rocks formed when sediment is deposited and becomes tightly compacted. Depending on the origin of the sediments they contain, sedimentary rocks are classified as clastic sedimentary rocks, chemical sedimentary rocks, or evaporites. Sandstone and conglomerate, for example, consist of fragments of broken preexisting rocks or minerals and are classified as clastic sedimentary rocks. Limestone forms from the precipitation of calcium carbonate through water and is classified as a chemical sedimentary rock. Gypsum and halite deposits form through the evaporation of mineral-rich water and are classified as evaporites.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.