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Definition of Tonofibril
1. Noun. (biology) A structural fibril of tonofilaments found in the cytoplasm of epithelial cells ¹
¹ Source: wiktionary.com
Medical Definition of Tonofibril
1. One of a system of fibres found in the cytoplasm of epithelial cells. See: cytoskeleton. Synonym: epitheliofibril, tenofibril. (05 Mar 2000)