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Definition of Tonofilament
1. Noun. (protein) A structural filament of keratin present in the cytoplasm ¹
¹ Source: wiktionary.com
Medical Definition of Tonofilament
1. Cytoplasmic filaments (10nm diameter: intermediate filaments) inserted into desmosomes. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)