migration

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migration

the movement of people into (immigration) and out of (emigration) a country that serves to increase or decrease the country's POPULATION and labour force. For example, immigration was an important factor in the early colonization of Australia and New Zealand, and the USA and Canada.
References in periodicals archive ?
Adult cases with potential post orthodontic tooth migration
Baume LJ: Physiological tooth migration and its significance for the development of occlusion.
Pathologic tooth migration which caused increase in spacing between upper anteriors was noticed by the patient for the past 2 months.