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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.
Nodules are thickenings or callouses that form on the vocal folds. They are a result of vocal trauma without periods of rest. Vocal folds (also called vocal cords or, by some, vocal chords) are not just strings in your voice box. Theyâre actually folds of tissue with a delicate lining on the outside.