The fundamental dimension of length, as defined by the SI standard.
(= Work-Dimension (* Force-Dimension Length-Dimension))
(= Area-Dimension (Expt Length-Dimension 2))
(= Energy-Dimension
(* Mass-Dimension
(* (Expt Length-Dimension 2) (Expt Time-Dimension -2))))
(= Force-Dimension
(* Mass-Dimension (* Length-Dimension (Expt Time-Dimension -2))))