Power per area
A general term for heat flow rate per unit area, power per unit area, irradiance, radient emmitance, and radiosity. All these terms are sometimes referred to as "intensity."
Mechanics
QUDT
http://qudt.org/vocab/quantity#Powerperarea
ODM2 Units Type Controlled Vocabulary
ODM2 Working Group
A vocabulary for describing the type of the Unit or the more general quantity that the Unit represents.