UnitsQ
UnitsQ[item]⟹validUnit
tests if the item is in the form of Units known to Emerald's EmeraldUnits.m package.
UnitsQ[item,compatibleUnit]⟹validUnit
tests if the item is compatible with compatibleUnit.
UnitsQ[item]⟹validUnit
tests if the item is in the form of Units known to Emerald's EmeraldUnits.m package.
UnitsQ[item,compatibleUnit]⟹validUnit
tests if the item is compatible with compatibleUnit.