"valves" in the noun sense
1. valve
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
2. valve
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
3. valve
control consisting of a mechanical device for controlling the flow of a fluid
4. valve
the entire one-piece shell of a snail and certain other molluscs
5. valve
one of the paired hinged shells of certain molluscs and of brachiopods
Source: WordNet® (An amazing lexical database of English)
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