Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From German Malakon from ancient Greek μαλακόν, neuter of μαλακός soft.
Definition of malacon in US English:
malacon
nounˈmaləkən
Mineralogy
A soft brown altered form of zircon.
Origin
Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From German Malakon from ancient Greek μαλακόν, neuter of μαλακός soft.