Noun
A little bundle; a fascicle.
A division of a book.
Source: Webster's dictionaryAdditionally, a case study completed on a 54-year-old man with a large infarct in the arcuate fasciculus indicated that severe conduction aphasia can be successfully treated. Source: Internet
In special cases, where only one eye deviates and the other does not, this often indicates a lesion (or damage) of the medial longitudinal fasciculus (MLF), which is a brainstem nerve tract. Source: Internet