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Arafura Sea
Aragón
aragonite
Aral Sea
Araldite
aralia
Aramaic
Aran
Aran Islands
araneomorph
Arapaho
arapaima
Ararat, Mount
Araucanian
araucaria
Arawak
Arawakan
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arachidonic acid
ar·a·chi·don·ic ac·id [ àrrəki dònnik ássid ]


noun 
Definition:
 
fatty acid: an essential fatty acid found in most animal fats that is a precursor of prostaglandins
[< modern Latin arachid- "peanut" (< Greek arakhos "type of leguminous plant") + -one]
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