Etymology
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sedimentation (n.)

"the deposition of sediments," 1845; see sediment + -ation, ending used in forming nouns of action. The uncommon verb sediment is attested only from 1899 and could be a back-formation.

updated on April 07, 2022

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Definitions of sedimentation from WordNet

sedimentation (n.)
the phenomenon of sediment or gravel accumulating;
Synonyms: deposit / alluviation
From wordnet.princeton.edu, not affiliated with etymonline.