Located, occurring, or existing outside a cell or cells.
From Latin 'extra' (outside) + Medieval Latin 'cellula' (small cell, from 'cella'). Modern biological term developed in the 19th century with cellular microscopy advancement.
Cells are tiny living packages—extracellular is one of biology's most important words because it describes everything that happens in the space between cells, where nutrients travel and waste gets removed.
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