decoy
/ˈdiːkɔɪ/ noun C1- A person or object meant to lure somebody into danger.
- A real or fake animal used by hunters to lure game.
- Deceptive military device used to draw enemy attention or fire away from a more important target.
- An assembly of hooped or netted corridors into which wild ducks may be enticed (originally by tame ducks) and trapped.
Plural decoys
From the library
The bird-trap was quite empty, as he had caught nothing, and he had to kill a pied Partridge, which he had tamed for a decoy.
The idea of using her as a decoy was clearly already in his mind, though he may not have been certain how the details of his plot were to be arranged.
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