UnitBase
UnitBase[q]⟹baseUnit
returns only the unit portion of the item in absence of the metric magnitude (sans the number and prefix).
UnitBase[UnitDimension]⟹baseUnit
return only the unit portion of the item in absence of the metric magnitude (sans the number and prefix).
UnitBase[UnitDimension,All]⟹baseUnitList
returns only the unit portion of the item in absence of the metric magnitude (sans the number and prefix).

