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n.
the small fringe of hair on the bony ridge just above the eye. It helps to prevent moisture from running into the eye. Anatomical name: supercilium.
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eye·brow (iґbrou) 1. the transverse elevation at the junction of the forehead and the upper eyelid, consisting of five layers: skin, subcutaneous tissue, a layer of interwoven fibers of the orbicularis oculi and occipitofrontalis muscles, a submuscular areolar layer, and pericranium; called also supercilium [TA]. 2. the hairs growing on this elevation; called also supercilia [TA].Medical dictionary. 2011.