an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system | a protective cover that protects the face of a watch |
an abstract part of something | glassware made of quartz |
something determined in relation to something that includes it | a crystalline element used as a component in various electronic devices |
| a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces |
| a solid formed by the solidification of a chemical and having a highly regular atomic structure |
| colorless glass made of almost pure silica |