[fawl-out] /ˈfɔlˌaʊt/

the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout)
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the particles themselves.
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an unexpected or incidental effect, outcome, or product:
the psychological fallout of being obese.
effects; results:
emotional fallout from a divorce.
the descent of solid material in the atmosphere onto the earth, esp of radioactive material following a nuclear explosion
any solid particles that so descend
(informal) side-effects; secondary consequences
verb (intransitive, adverb)
(informal) to quarrel or disagree
(intransitive) to happen or occur
(military) to leave a parade or disciplinary formation
sentence substitute
(military) the order to leave a parade or disciplinary formation

“radioactive particles,” 1950, from fall (v.) + out (adv.).


[1950s+; fr the radioactive dust and other debris of a nuclear explosion]


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