Koncentracija
Koncentracija is a term used in several South Slavic languages to denote two related concepts: the state of being focused or attentive, and the amount of a substance present in a mixture. The word derives from Latin concentratio, via medieval Latin and vernacular forms, rooted in con- “together” and centrum “center”.
In science, concentration refers to the amount of solute in a given amount of solution or solvent.
In everyday language, concentration also means the ability to direct and sustain attention on a task. It