Plural of alfalfa; a plant with purple flowers that is widely grown as food for livestock because it is very nutritious and nitrogen-rich.
From Spanish 'alfalfa,' derived from Arabic 'al-fisfisa' or 'al-fiṣfiṣa.' The word entered European languages in the 16th-17th centuries when Spanish colonizers brought both the crop and its name to the Americas from the Middle East and North Africa.
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