say it: il-ek-troh-MAG-nuh-tiz-uhm
electromagnetism is a noun meaning "magnetism produced by an electric current". It carries 2 recorded senses.
magnetism produced by an electric current
“electromagnetism was discovered when it was observed that a copper wire carrying an electric current can magnetize pieces of iron or steel near it”
the branch of physics concerned with electromagnetic phenomena
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for electromagnetism come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.