A regional or folk name for a plant or bird, or possibly a plant with seeds or structures resembling a chicken's beak.
Compound word from 'chicken' and 'bill' (beak); likely a descriptive folk name applied to plants or creatures based on physical resemblance to a bird's beak or bill.
Descriptive compound names like 'chickenbill' show how non-scientific observers created visual metaphors for nature—if it looked like a chicken's beak, that's what you'd call it, long before anyone cared about Latin botanical names.
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