The property of an object that is not superimposable on its mirror image, like left and right hands.
From Greek 'cheir' (hand). Coined by Lord Kelvin in 1893. Your hands are chiral — mirror images that can't overlap. This property is crucial in chemistry: mirror-image molecules can have wildly different effects.
Your left hand and right hand are mirror images but you can NEVER stack them perfectly — that's chirality! In chemistry, mirror-image molecules can be medicine OR poison! One saved lives, its mirror killed people (thalidomide). Handedness matters! 🤚🪞
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