Definition:Dimension (Measurement)/Fundamental Dimensions

Definition
The SI-recommended fundamental dimensions are:
 * $\mathsf M$: mass
 * $\mathsf L$: length
 * $\mathsf T$: time
 * $\Theta$: temperature
 * $\mathsf I$: electric current
 * $\mathsf N$: amount of substance
 * $\mathsf J$: luminous intensity

Also defined as
Some sources prefer to use:
 * $\mathsf Q$: electric charge

instead of $\mathsf I$: electric current.