Nerve fibres, or axons, are long thread-like structures that transmit electrical impulses from one neuron to another. Synonyms for nerve fibre include nerve strand, nerve cord, axon bundle, nerve trunk, and nerve filament. These terms all refer to various sizes or groupings of nerve fibres in different parts of the nervous system. For example, nerve strands typically refer to individual axons that form the peripheral nerves, while nerve cords are bundles of axons found in the central nervous system. Knowing synonyms for nerve fibres can be helpful for understanding the complex anatomy and physiology of the nervous system.