The amount of a substance in a given volume or the action of focusing attention or effort on a particular activity or subject.
From Latin 'con-' (together) + 'centrum' (center). Originally meant bringing things to a common center, developing both chemical and mental focus meanings by the 17th century.
This word beautifully bridges the physical and mental worlds - whether describing molecules in solution or thoughts in meditation, it's about gathering scattered elements into focused intensity. The same principle governs chemistry labs and mindfulness practice.
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