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nodule - (mineralogy) a small rounded lump of mineral substance (usually harder than the surrounding rock or sediment) mineralogy - the branch of geology that studies minerals: their structure and properties and the ways of distinguishing them.
A lung nodule is a small, solid abnormality in the lung. Nodules are most commonly detected on a chest X-ray or CT scan. There are many causes of nodules.Depending on the cause, a nodule may have no importance or it may represent a serious disease.Some of the most common causes of lung nodules include: lung nodule is a small, solid abnormality in the lung. Nodules are most commonly detected on a chest X-ray or CT scan. There are many causes of nodules.