Plural of hart; multiple male red deer, especially when fully grown.
From Old English 'heorot' or 'hart,' a Germanic word for male deer. The term has been used since Anglo-Saxon times and remains standard in English for referring to male red deer.
The word 'hart' survives in English while most other animal-specific gender words have disappeared—we say 'male deer' now, but medieval hunters still called them 'harts,' keeping this Old English treasure alive in hunting and heraldry.
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