crichtonite
/ˈkrʌɪtənʌɪt/Mineralogy
noun
A titanium and iron-containing mineral found as black rhombohedral crystals.
- Crichtonite is an oxide of titanium, iron, and manganese with some rare earth elements; (Sr,La,Ce,Y)(Ti,Fe3+, Mn)21O38. Crystal system: trigonal. Formerly thought to be identical to ilmenite..
Origin
Early 19th century. From the name of Sir Alexander A. Crichton, Scottish physician and mineral collector + -ite, after French craitonite.
- knockout mouse
- knock people's heads together
- knock someone back
- knock someone dead
- knock someone down (or over)
- knock someone for six
- knock someone into the middle of next week
- knock someone off
- knock someone off their perch
- knock someone on the head
- knock someone out
- knock someone over
- knock someone's block off
- knock someone sideways
- knock someone's socks off
- knock someone/thing about (or around)
- knock someone/thing into shape
- knock someone up
- knock something back
- knock something down
- knock something into a cocked hat
- knock something off
- knock something on the head
- knock something out
- knock something over