sugar snap pea

Also called sugar pea, this sweet pea is a cross between the english pea and the snow pea. It's entirely edible-pod and all. Sugar snap peas are available during spring and fall. Choose plump, crisp pods with a bright green color. Refrigerate in a plastic bag for up to 3 days. Sugar snap peas should be served raw or only briefly cooked in order to retain their crisp texture. See also pea.

The noun has 2 meanings:

Meaning #1: variety of pea plant producing peas having crisp rounded edible pods
  Synonym: snap pea

Meaning #2: green peas with edible pods that are very crisp and not flat