vaina

The Daugava or Western Dvina (, , , , , , ) is a river rising in the Valdai Hills, Russia, flowing through Russia, Belarus, and  Latvia, draining into the Gulf of Riga in Latvia, an arm of the Baltic Sea. The total length of the river is 1,020 km (634 mi).It is connected by a canal with Berezina and Dnieper rivers.It is not to be confused with Northern Dvina.
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n. sheath, scabbard; husk, shuck; seed pouch, pod; shell

= pod, husk.
Ex: At harvest, plants were separated into three sections and all pods were removed by hand from each of the three sections and then hand shelled.
Ex: This peat is rich in beaver chewed wood fragments, twigs, sedge, seeds, husks, coleoptera parts, small bones, and conifer cones.