superhard
adjective
su·per·hard ˌsü-pər-ˈhärd 
: extremely hard
One way to achieve such a high pressure … is to squeeze a sample between two superhard surfaces.
William J. Nellis
William J. Nellis
Word History
First Known Use
1891, in the meaning defined above
- stereography
- stereoing
- stereoisomer
- stereoisomeric
- stereoisomeride
- stereoisomerism
- stereoisomerisms
- stereoisomers
- stereokinesis
- stereological
- stereologically
- stereologies
- stereology
- stereom
- stereome
- stereomes
- stereometer
- stereometers
- stereometric
- stereometry
- stereomicrograph
- stereomicrography
- stereomicrometer
- stereomicroscope
- stereomicroscopes