Meaning

noun the vessel that contains the seeds of a plant (not the seeds themselves)

noun a several-seeded dehiscent fruit as e.g. of a leguminous plant

noun a group of aquatic mammals

originOrigin uncertain. Perhaps from Middle English *pod ("seed-pod, husk, shell, outer covering"; attested in pod-ware (“legume seed; seed grain”)), itself possibly from Old English pād (“an outer garment, covering, coat, cloak”), from Proto-West Germanic *paidu, from Proto-Germanic *paidō (“coat, smock, shirt”), from Proto-Indo-European *baiteh₂- (“woolen clothes”). If so, then cognate with Old Saxon…

Etymology from Wiktionary, CC BY-SA 3.0