An archaic or heraldic term for a star, used in descriptions of celestial bodies or in coat-of-arms imagery.
From Old French 'astre', derived from Latin 'astrum' meaning 'star.' This word is primarily obsolete in modern usage but survives in heraldry and poetic contexts.
While modern English switched to 'star', older French and English kept 'astre'—you can still see it in heraldry where knights' shields are described with stars, keeping medieval vocabulary alive!
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