noun
1Christian Church
A member of any of a number of sects, both in the early church and later, who imitated the biblical Adam by going naked, typically as a symbol of purity.2A person who is descended from the biblical Adam, especially a member of a specific branch of humanity derived from the biblical Adam rather than some other ancestor.
3Specifically. A white Caucasian. Now chiefly historical.
adjective
Descended or deriving from the biblical Adam.
Origin
Mid 16th century; earliest use found in Thomas Elyot (c1490–1546), humanist and diplomat. From the name of Adam + -ite.
noun
MineralogyA zinc mineral occurring as yellow, green, or colourless crystals or crystal aggregates.
Adamite is a hydrous zinc arsenate, Zn₂AsO₄(OH). Crystal system: orthorhombic.
Origin
Mid 19th century; earliest use found in Geological Magazine. From the name of G. J. Adam, French mineralogist, who supplied the first specimens of the mineral + -ite, after French adamine adamine.