Gyrostat:A gyroscope is a device for measuring or maintaining orientation, based on the principles of conservation of angular momentum. A mechanical gyroscope is essentially a spinning wheel or disk whose axle is free to take any orientationhttp://gyazo.com/27995cff09858c548f55b950813a8770
Chalazion:A chalazion (plural chalazia), also known as a meibomian gland lipogranuloma, is a cyst in the eyelid that is caused by inflammation of a blocked meibomian gland, usually on the upper eyelid.
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