dimensionless
noun(di-men-sion)
measure in one direction; specifically : one of three coordinates determining a position in space or four coordinates determining a position in space and time
dimensionless
noun(di-men-sion)
one of a group of properties whose number is necessary and sufficient to determine uniquely each element of a system of usually mathematical entities (such as an aggregate of points in real or abstract space); also : a parameter or coordinate variable assigned to such a property
dimensionless
noun(di-men-sion)
the number of elements in a basis of a vector space