li'bril

One of the ultimate fiberlike divisions composing a fiber or bundle; also any very minute fiber, achromatic f's. Syn.achromatic: cell threads, inter stellate of nuclear or cell lines. F's substance, forming lines which extend from pole to pole in a dividing nucleus, in such a way as to form a spindle-shaped or barrel shaped figure, chromatic f's, chromatin f's. See nuclear f's. connective ti ue f's. F's which, being collected in bundles, form the fibers or fasciculi of white fibrous connective ti ue. elementary f's. See primitive f's. inter muscular f's. Small branches of the intermediate plexus of nerve fibers in unstriped muscular ti ue which run between the muscle cells, intracellular f's. The delicate, threadlike ma es composing the more solid part of the protoplasm of the cell body, intranuclear f. See nuclear fibrils, nuclear f's, nucleoplasmic f's. The threadlike fibers consisting of^ the more solid substance or chromatin in a cell nucleus. See karyokinesis, primary chromatic fibers, and secondary chromatic fbers. primitive f's. The ultimate or elementary f's of which the axis cylinder is composed, protoplasmic f. A f. or