Pod
POD, noun The pericarp, capsule or seed vessel of certain plants. The silique or pod is an oblong, membranaceous, two valved pericarp, having the seeds fixed along both sutures. A legume is a pericarp of two valves, in which the seeds are fixed along one suture only.
According to these descriptions, the seed vessels of peas and beans are legumes, and not pods; but in popular language, pod is used for the legume as well as for the silique or siliqua. In New England, it is the only word in popular use.
POD, verb intransitive To swell; to fill; also, to produce pods.