A technical or scholarly explanation of a difficult word or passage; also an anatomical term for the tongue in medical contexts.
From Latin 'glossa,' borrowed from Greek 'glōssa' meaning 'tongue' or 'language.' In medieval scholarship, it became the standard term for marginal or interlinear explanations of texts, creating a bridge between anatomy and linguistics.
The Romans noticed that just as your tongue helps you speak clearly, explanatory notes help readers understand texts—so they used the same word 'glossa' for both, creating a beautiful metaphor that lasted a thousand years.
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