a substance that causes illness, injury or death if taken into the body or produced within the body.
poison
A device that responds to a physical stimulus (as heat, light, sound, pressure, magnetism, or a particular motion) and transmits a resulting impulse (as for measurement or operating a control).
sensor
the fence around the outer edge of an area of land or the border around it
perimeter fence
a camera that checks out what is going on somewhere for security reasons
CCTV camera
a number of devices designed to scare birds
bird scarer
a bird that hunts and eats other animals
bird of prey
a device or hole for catching animals or people and preventing their escape
trap
the grassy area right next to the runway
grass margin
a dog that has been trained to find drugs or explosives by using its sense of smell
sniffer dog
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