refractory — refractorily, adv. refractoriness, n. /ri frak teuh ree/, adj., n., pl. refractories. adj. 1. hard or impossible to manage; stubbornly disobedient: a refractory child. 2. resisting ordinary methods of treatment. 3. difficult to fuse, reduce, or… … Universalium
List of colors — See also: List of colors (compact), List of color palettes, and Index of color related articles Color is an important part of the visual arts, fashion, interior design and many other fields and disciplines. The following is a comprehensive… … Wikipedia
Wood fuel — is wood used as fuel. The burning of wood is currently the largest use of energy derived from a solid fuel biomass. Wood fuel can be used for cooking and heating, and occasionally for fueling steam engines and steam turbines that generate… … Wikipedia