Source : WordNet®

field pea
     n 1: seed of the field pea plant
     2: variety of pea plant native to the Mediterranean region and
        North Africa and widely grown especially for forage [syn:
        {field-pea plant}, {Austrian winter pea}, {Pisum sativum
        arvense}, {Pisum arvense}]
     3: coarse small-seeded pea often used as food when young and
        tender