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Noun, pl. fibrils

1. A fine fiber, such as a myofibril or neurofibril. (

2. A fine fibre or filament. (

3. (Biology)
Any fine, filamentous structure in animals or plants. (

4. A small or slender fiber. (Google Dictionary)

5. The diminuitive of fibre. A small fibre, a fine thread. (

Word origin: 1680s, back-formation from Modern Latin fibrilla, diminutive of Latin fibra.

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