radiation - the spread of a group of organisms into new habitats

absorption - (physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium; "the absorption of photons by atoms or molecules"

acidification - the process of becoming acid or being converted into an acid

adiabatic process - (thermodynamics) any process that occurs without gain or loss of heat

aeration - the process of exposing to air (so as to purify)

antiredeposition - the process of preventing redeposition

capture - any process in which an atomic or nuclear system acquires an additional particle

capture - a process whereby a star or planet holds an object in its gravitational field

centrifugation - the process of separating substances by the use of a centrifuge

chemical action, chemical change, chemical process - (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved

chromatography - a process used for separating mixtures by virtue of differences in absorbency

concretion - the formation of stonelike objects within a body organ (e.g., the kidneys)

condensation - the process of changing from a gaseous to a liquid or solid state

convection - (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere

clotting, coagulation, curdling - the process of forming semisolid lumps in a liquid

decay - the process of gradually becoming inferior

demagnetisation, demagnetization - the process of removing magnetization

desorption - changing from an adsorbed state on a surface to a gaseous or liquid state

diffusion - (physics) the process of diffusing; the intermingling of molecules in gases and liquids as a result of random thermal agitation

disintegration, dissolution - separation into component parts

distillation, distillment - the process of purifying a liquid by boiling it and condensing its vapors

drift - the gradual departure from an intended course due to external influences (as a ship or plane)

effervescence - the process of bubbling as gas escapes

cataphoresis, dielectrolysis, electrophoresis, ionophoresis - the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode

ecesis, establishment - (ecology) the process by which a plant or animal becomes established in a new habitat

extinction - the reduction of the intensity of radiation as a consequence of absorption and radiation

extraction - the process of obtaining something from a mixture or compound by chemical or physical or mechanical means

feedback - the process in which part of the output of a system is returned to its input in order to regulate its further output

filtration - the process whereby fluids pass through a filter or a filtering medium

flocculation - the process of flocculating; forming woolly cloudlike aggregations

flow - any uninterrupted stream or discharge

formation - natural process that causes something to form; "the formation of gas in the intestine"; "the formation of crystals"; "the formation of pseudopods"

fossilisation, fossilization - the process of fossilizing a plant or animal that existed in some earlier age; the process of being turned to stone

geologic process, geological process - (geology) a natural process whereby geological features are modified

curing, solidification, solidifying, hardening, set - the process of becoming hard or solid by cooling or drying or crystallization; "the hardening of concrete"; "he tested the set of the glue"

ignition - the process of initiating combustion

inactivation - the process of rendering inactive; "the gene inactivation system"; "thermal inactivation of serum samples"

induction - the process whereby changes in the current flow in a circuit produce magnetism or an EMF

ion exchange - a process in which ions are exchanged between a solution and an insoluble (usually resinous) solid; widely used in industrial processing