A muscle controlling the eye's accommodation for viewing objects at varying distances(noun)
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Use "ciliary muscle" in a sentence
"(1816-95; physiology of the circulation and excretions, theory of the functions of the kidneys, endosmosis, discovery of the nerves of secretion) and Ernest Wihelm Ritter von Brucke (1819-92; studies of the ciliary muscle as a muscle of accommodation, theory of colours, physiology of the voice, structure of the muscle-fibres, biliary capillaries, digestion, absorption)."