Answer: fibril

AnswerCrossword Clue
FIBRILSlender thread
FIBRILSmall thread.
FIBRILSmall filament
FIBRILSmall thread
FIBRILRoot hair
fibrila small fibre, also FIBRILLA
fibrilany threadlike structure or filament
fibrilany of the delicate hairs on the young roots of some plants
fibrilsmall or fine fiber or filament