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| Carboy
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A large and heavy glass vessel, originally designed for the storage of chemicals but now commonly used as a container for bottle gardens. |
| Carburize
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Also called case hardening. The addition of hardness to the surface of steel by heating the steel in contact with carbon. Heated material is exposed to carbon then hardened by quenching or cooling slowly, reheating and quenching again. Used on tolls which need to retain the resilience of a soft metal to avoid cracking but need a hard surface or when it is simpler or cheaper to shape and carburize a softer material rather than using a harder metal. Cutting tools used for metal lathes or milling machines or the center of a lathe tailstock are usually carburized for wear resistance. Tools that must remain sharp while being resistant to impact are often carburized |
| Carcinogen
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An agent suspected or known to cause cancer. |
| Carnauba
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One of the primary ingredients of paste wax, which is often used on wood floors, this hard wax comes from the leaves of the wax palm plant. |
| Carnivorous
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Used in the gardening world to denote a plant (usually tropical) that typically lives in highly acidic soil that doesn't adequately provide enough nourishment. Nature has adapted these plants to trap and consume insects for this need. An example is the Venus Flytrap plant. |
| Carnot cycle
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An ideal heat engine (conceived by Sadi Carnot) in which the sequence of operations forming the working cycle consists of isothermal expansion, adiabatic expansion, isothermal compression, and adiabatic compression back to its initial state. |
| Carpenter
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Workman who builds and repairs wooden structures. |
| Carpenter's pencil
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Used for marking measurements on wood, this flat pencil has wide and durable lead. |
| Carpenter's square
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Flat L-shaped measuring tool, also called a framing square, is used to calculate lengths and lay out angles. The legs of the L, which come together at a right angle, have measuring tables and marks for rafter cuts etched into them. Also called a framing square. |
| Carpentry
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The work and trade of building and repairing wooden structures. |
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