The outer membrane or sheath surrounding the axon of a nerve cell.
From Greek 'axon' (axis, axle) + 'lemma' (sheath or husk). This anatomical term was coined in the 19th century to describe the delicate covering of nerve fibers.
Your nerve fibers are insulated like electrical wires, and the axilemma is the biological plastic wrap that keeps the electrical signal from leaking out—think of it as nature's insulation system.
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