| subpellicular fibril | A microtubule lying beneath the unit membrane (pellicle) of many protozoans, often as a palisade of longitudinally arranged fibrils connected by fine lateral bridges that support the external cell form; in certain sporozoan stages a fixed number of microtubule's are found, extending longitudinally from the polar ring. Synonym: subpellicular fibril. (05 Mar 2000) |
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| subpellicular microtubule | A microtubule lying beneath the unit membrane (pellicle) of many protozoans, often as a palisade of longitudinally arranged fibrils connected by fine lateral bridges that support the external cell form; in certain sporozoan stages a fixed number of microtubule's are found, extending longitudinally from the polar ring. Synonym: subpellicular fibril. (05 Mar 2000) |
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| muscular fibril | <cell biology> Long cylindrical organelle of striated muscle, composed of regular arrays of thick and thin filaments and constituting the contractile apparatus. (18 Nov 1997) |
| fibril | The diminuitive of fibre. A small fibre, a fine thread. (12 Dec 1998) |