a minute, narrow tubelike cell structure composed of a protein similar to actin, occurring singly and in bundles, involved in cytoplasmic movement and changes in cell shape.
mi·cro·fil·a·ment (mī'krō-fĭl'ə-mənt) n. Any of the minute fibers located throughout the cytoplasm of cells, composed of actin and functioning primarily in maintaining the structural integrity of a cell. mi'cro·fil'a·men'tous (-měn'təs) adj.
Main Entry: mi·cro·fil·a·ment Pronunciation: "mI-krO-'fil-&-m&nt Function: noun : any of the minute actin-containingprotein 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 —mi·cro·fil·a·men·tous/-"fil-&-'ment-&s/adjective
microfilament mi·cro·fil·a·ment (mī'krō-fĭl'ə-mənt) n. Any of the minute fibers located throughout the cytoplasm of cells, composed of actin and functioning primarily in maintaining the structural integrity of a cell.