orthoclase
/ˈɔːθəkleɪz
/noun [mass noun]
A common rock-forming mineral occurring typically as white or pink crystals. It is a potassium-rich alkali feldspar and is used in ceramics and glass-making.Feldspars are added as orthoclase in order to reduce the devitrification of the glass....
- Of these, alkali feldspar, particularly orthoclase, is the most common.
- Associated minerals are white orthoclase, milky quartz, and muscovite.
Origin
Mid 19th century: from ortho- 'straight' + Greek klasis 'breaking' (because of the characteristic two cleavages at right angles).
- between you and me and the wall
- be twice the man/woman (that someone is)
- betwixt
- betwixt and between
- be two a penny
- be two (or ten) a penny
- beun
- be unable to believe one's eyes (or ears)
- be unable to hear oneself think
- be unable to (or be hardly able to) believe one's luck
- be unable to punch one's way out of a paper bag
- be unable to see the wood (or the forest) for the trees
- be under no illusion (or illusions)
- be under the illusion that
- be up shit creek
- be up shit creek (also be up shit creek without a paddle)
- be up the creek
- be up with the lark
- beurre blanc
- beurre manié
- beurre noir
- beurre noisette
- beurré
- Beuthen
- Beuys, Joseph