Term: valve: the entire one-piece shell of a snail and certain other molluscs
Broader: covering: a natural object that covers or envelops | Unrelated: rundle: one of the crosspieces that form the steps of a ladder
Broader: covering: a natural object that covers or envelops | Unrelated: desmodontidae: true vampire bats
Broader: covering: a natural object that covers or envelops | Unrelated: organism: a system considered analogous in structure or function to a living body
Broader: covering: a natural object that covers or envelops | Unrelated: pitymys: pine mice
Broader: covering: a natural object that covers or envelops | Unrelated: emulsion: (chemistry) a colloid in which both phases are liquids
Broader: covering: a natural object that covers or envelops | Unrelated: smoke screen: (military) screen consisting of a cloud of smoke that obscures movements
Broader: covering: a natural object that covers or envelops | Unrelated: mystery: something that baffles understanding and cannot be explained
Broader: covering: a natural object that covers or envelops | Unrelated: cowbird: North American blackbird that follows cattle and lays eggs in other birds' nests
Broader: covering: a natural object that covers or envelops | Unrelated: odobenus: type genus of the Odobenidae: walruses
Broader: covering: a natural object that covers or envelops | Unrelated: aquifer: underground bed or layer yielding ground water for wells and springs etc