bun'dle

A collection of fibers having the same general direction; in vegetable morphology, the e ential anatomical element of the fascicular system, a ociation b's. The a ociation fibers of the cerebrum. See under fiber, auriculoventricular b. The bundle of modified heart muscles forming the conducting system between auricles and ventricles. bicollateral b. A fibrovascular b. in which a single strand of xylem is interposed between two strands of phloem^ or vice vers a, b. sheath. The cylindrical ma of parenchyma which surrounds a fibrovascular b. dorsal cro ed b. See dorsal cro ed fasciculus, under fasciculus. dorsal direct b. See dorsal direct fasciculus, under fasciculus, primitive b. A muscular fiber. [Etymology doubtful.]