[化] 再浓集; 再浓缩

Reconcentration \Re*con`cen*tra"tion\, n.
The act of reconcentrating or the state of being
reconcentrated; esp., the act or policy of concentrating the
rural population in or about towns and villages for
convenience in political or military administration, as in
Cuba during the revolution of 1895-98.
[Webster 1913 Suppl.]