Nonmetal
Nonmetal may refer to:

 Nonmetal (chemistry), a chemical element with relatively low density and high electronegativity 
 Nonmetal (astrophysics), refers only to the elements hydrogen and helium

See also

 Materials science, whose main classes of materials also include:
 Ceramic, a hard, brittle, heat-resistant and corrosion-resistant material
 Polymer, consisting of very large molecules composed of many repeating subunits
 Semiconductor, which has electrical conductivity between conductor and insulator
 Glass, a non-crystalline solid 
 Composite material, material produced from two or more constituents
 Quartz,  a hard, crystalline mineral
 Feldspar, a group of rock-forming aluminium tectosilicate minerals
 Mica, a group of silicate minerals