Meanings

Osteichthyes (class comprising the bony fishes and sometimes their descendants, i.e. tetrapods)

cranial dura mater

primary lateral sclerosis

fortis

Mohs' hardness

Mohs' hardness

epidural anaesthesia

epidural block

epidural haemorrhage

scleroprotein

vulcanite

sclerotic

hard rubber (e.g. ebonite, vulcanite)

cemented carbide

cemented carbide

scratch hardness

age hardening

bony fishes

regulation baseball (as opposed to the variety played with a rubber ball)

commemorative coin