The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Radon (0 members)
- MicroFaradPerMetre (0 members)
- LeadOxideCompound (3 members)
- Near-Infrared (NIR) Spectroscopy (0 members)
- AreicCapacity (0 members)
- Layer thickness homogeneity (calendered electrode film) (0 members)
- SpatialSequence (0 members)
- Gel Permeation Chromatography (GPC) (0 members)
- ThalliumAtom (0 members)
- BatteryTray (0 members)
- Light transmission (0 members)
- Sedimentation Test, Sedimentation Analysis (Andreasen Pipette Method) (0 members)
- AngularVelocity (0 members)
- FuelCell (0 members)
- GroveCell (0 members)
- CatalyticActivity (0 members)
- Bromine (0 members)
- CopperIIAcetate (0 members)
- ChemicalSymbolicConstruct (1 member)
- CopperSymbol (0 members)
- CyclotronAngularFrequency (0 members)
- RelativeVolumeStrain (0 members)
- TeraOhm (0 members)
- Volt (0 members)
- SquareTemperatureUnit (1 member)
- ManganeseIISulfate (0 members)
- ZincFluoride (0 members)
- Meson (5 members)
- DeciNewtonMetre (0 members)
- StandardChemicalPotential (0 members)
- AluminiumSulfide (0 members)
- BatteryPack (0 members)
- NegativeElectrodeElectronicConductivity (0 members)
- ServiceLife (0 members)
- MechanicalQuantity (36 members)
- Monetary Grant (0 members)
- MegaPascal (0 members)
- DiscreteData (2 members)
- TokenData (3 members)
- PicoCoulomb (0 members)
- CelsiusTemperatureMeasurement (0 members)
- CobaltIIPhosphate (0 members)
- SulfuricAcid (0 members)
- StrongBase (6 members)
- SeriesParallelConnection (0 members)
- PowerAreaUnit (1 member)
- Graphene (0 members)
- ZincChloride (0 members)
- MilliPascalSecond (0 members)
- Thiourea (0 members)