An obsolete or dialectal variant of cracca; a medieval term for a type of wild pea or vetchling plant.
Likely a Latinized variant of 'cracca' (Latin plant name), with the '-us' masculine suffix characteristic of Latin botanical nomenclature.
Scientific names are fossils of different languages—craccus is Latin, but the root is unknown, showing how modern botanical naming inherited mysteries from medieval herbalists who documented plants without understanding their origins.
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