Basic Guidelines For English Spellings
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Any of the herbaceous plants comprising the genus Erodium (family Geraniaceae), resembling the cranesbills and found widely in the northern hemisphere; a storksbill. Formerly also: a cranesbill (genus Geranium).
Late 16th century; earliest use found in Henry Lyte (1529–1607), botanist and antiquary. From the genitive of heron + bill.