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Noun, pl. cavities 1.(Science: anatomy) A hollow place or space or a potential space, within the body or in one of its organs, it may be normal or pathological. ( 2. A fluid filled space in many animals where organs typically develop, as in body cavity. ( 3. (Dentistry) Damage to the structure of a tooth (, or a soft area in a decayed tooth. ( Syn: Dental caries   Word origin: From Late Latin cavitas, from Latin cavus (“hollow”), from Proto-Indo-European *ḱówHwos, from root Proto-Indo-European...

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