field pea

A variety of yellow or green pea grown specifically for drying. These peas are dried and usually split along a natural seam, in which case they're called split peas. Whole and split dried field peas are available packaged in supermarkets and in bulk in natural food stores. Field peas do not usually require presoaking before cooking. See also pea legume.

The noun has 3 meanings:

Meaning #1: seed of the field pea plant

Meaning #2: variety of pea plant native to the Mediterranean region and North Africa and widely grown especially for forage
  Synonyms: field-pea plant, Austrian winter pea, Pisum sativum arvense, Pisum arvense

Meaning #3: coarse small-seeded pea often used as food when young and tender