A Hebrew letter or character, or a small administrative unit in biblical times.
From Hebrew 'adin,' potentially related to Semitic roots for 'small' or 'delicate.' Usage is rare and primarily appears in biblical or historical contexts.
Adin was a person in the Bible who led a small group back from exile, and his name became almost proverbial—when you're trying to describe a tiny, determined group, 'Adin's children' popped up in historical texts.
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