noun.
A small bundle of nerve, muscle or tendon fibers.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a bundle of fibers (especially nerve fibers)
Word Usage
"The Extensor coccygis is a slender muscular fasciculus, which is not always present; it extends over the lower part of the posterior surface of the sacrum and coccyx."