field strength is a noun meaning "the vector sum of all the forces exerted by an electrical or magnetic field (on a unit mass or unit charge or unit magnetic pole) at a given point in the field". It carries one recorded sense.
the vector sum of all the forces exerted by an electrical or magnetic field (on a unit mass or unit charge or unit magnetic pole) at a given point in the field
Definitions, synonyms and semantic relations for field strength come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.