A solid material whose atoms are arranged in a highly ordered, repeating pattern extending in all three spatial dimensions. The scientist examined the crystal under a microscope to study its structure.
A piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces. She admired the beautiful crystal that formed naturally in the cave.
A clear, transparent mineral or glass resembling ice. The chandelier was adorned with sparkling crystal that caught the light beautifully.
A high-quality, clear, colorless glass, often used for making fine glassware. They toasted with crystal glasses at the wedding reception.
A crystalline piece of a substance, such as quartz, used in electronics as a frequency-determining element. The watch uses a quartz crystal to keep accurate time.