accretionary

Growing by addition

Accretionary describes something formed by gradual accumulation or growth.

The term appears most often in geology, where an accretionary wedge or prism is a mass of sediment scraped off a descending tectonic plate and piled against the overriding plate.

More broadly, accretionary processes build up material over time: accretionary growth, accretionary deposits.

growth

accumulation

Collected mass over time

amplification · aggregation · buildup · gradual · compounding · snowballing · amassing · gathering · collecting · agglomeration

depositional

sediment

Particles settling in liquid

bedding · sedimentation · deposition · strata · banding · sequence · horizons · superposition · accumulation · concretion

geological

sediment

Particles settling in liquid

wedge · prism · convergence · trench · strata · metamorphism · faults · crust · mantle · seismic

planetary

protoplanetary

Preceding planetary formation

cosmic · interstellar · astrophysics · cosmology · gas · protostar · gravity · orbit · coalescing · aggregation

Opposites
growth vs. loss of material

accretionaryerosive

Causing gradual wearing away

erosional · ablative · eroding · subtractive · reductive

expansion vs. contraction

accretionarydecreasing

Becoming smaller or fewer

diminishing · shrinking · contracting · reducing · receding

Phrases
Family

accretionary wedge

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