accretion
pronunciation
How to pronounce accretion in British English:
UK [əˈkri:ʃn]
How to pronounce accretion in American English:
US [əˈkriʃən]
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- Noun:
- an increase by natural growth or addition
- something contributing to growth or increase
- (astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
- (biology) growth by addition as by the adhesion of parts or particles
- (geology) an increase in land resulting from alluvial deposits or water-borne sediment
- (law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance)
Word Origin
- accretion
- accretion: see crescent
- accretion (n.)
- 1610s, from Latin accretionem (nominative accretio) "an increasing, a growing larger" (as of the waxing moon), noun of action from past participle stem of accrescere, from ad- "to" (see ad-) + crescere "grow" (see crescent).
Example
- 1. Matter funnels into the supermassive black hole from a ring of material circling around it and called an accretion disk .
- 2. The tsu-headed group have challenged the planetary accretion theory as the sole planet-forming mechanism in favor of a faster " gravitational collapse " model .
- 3. Our scientific knowledge of nature grows through a self-correcting accretion process .
- 4. How a star creates herbig-haro jets is an ongoing topic of research , but it likely involves an accretion disk swirling around a central star .
- 5. One hypothesis suggests the gamma-ray flares occur when an extra amount of matter is pulled out of the accretion disk and injected into the jets .