mi·cro·fil·a·ment (m  kr -f l  -mnt)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·fila·mentous (-m nts) adj. |
microfilament [ˌmaɪkrəʊˈfɪləmənt]
n
(Life Sciences & Allied Applications / Biochemistry) thin filament, composed of the protein actin and associated proteins, that occurs abundantly in muscle and in the cytoplasm of other cells
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