Accretion Definition

ə-krēshən
accretions
noun
accretions
Growth or increase in size by gradual external addition, fusion, or inclusion.
American Heritage
Growth in size, esp. by addition or accumulation.
Webster's New World
Something contributing to such growth or increase.
American Heritage
A growing together of parts normally separate.
Webster's New World
The growing together or adherence of parts that are normally separate.
American Heritage
Antonyms:
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other
The gradual extension of land by natural forces, as in the addition of sand to a beach by ocean currents, or the extension of a floodplain through the deposition of sediments by repeated flooding.
American Heritage Science
The accumulation of additional mass in a celestial object by the drawing together of interstellar gas and surrounding objects by gravity.
American Heritage Science

Other Word Forms of Accretion

Noun

Singular:
accretion
Plural:
accretions

Origin of Accretion

  • Latin accrētiō accrētiōn- from accrētus past participle of accrēscere to grow accrue

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin accretio, from ad (“to”) + crēscō (“grow”).

    From Wiktionary

  • Compare crescent, increase, accrue

    From Wiktionary

  • First attested in the 1610's.

    From Wiktionary

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accretion