arcus : Idioms & Phrases
arcus senilis
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noun a whitish deposit in the shape of an arc that is sometimes seen in the cornea
arcus.
WordNet
arcus zygomaticus
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noun the slender arch formed by the temporal process of the cheekbone that bridges to the zygomatic process of the temporal bone
zygomatic arch; zygoma.
WordNet
lamina arcus vertebrae
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noun lamina of the vertebral arch; the flattened posterior part of the vertebral arch from which the spinous process extends