Definition of microfilament
: any of the minute actin-containing protein filaments of eukaryotic cytoplasm that function in maintaining structure and in intracellular movement
First Known Use of microfilament
Medical Definition of microfilament
: any of the minute actin-containing protein filaments that are widely distributed in the cytoplasm of eukaryotic cells, help maintain their structural framework, and play a role in the movement of cell components
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