A poetic or fanciful term for a bird that appears during frost or winter, or a bird adapted to cold climates.
A compound word formed from 'frost' and 'bird.' Likely a literary or regional creation rather than a standard term, reflecting the human tendency to name things by combining descriptive words.
Compound words like 'frostbird' show how English speakers have always been creative in their naming—we see the same impulse today when people invent new tech terms like 'smartphone' by mashing existing words together.
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