IGM

IGM as an acronym or abbreviation can refer to:

Immunoglobulin M (IgM), the primary antibody against A and B antigens on red blood cells
International Grandmaster, a chess ranking
intergalactic medium
Intragroup medium - see: Intracluster medium
IG Metall - the dominant German metalworkers' union
IGM Financial Inc. - Canada's largest manager and distributor of mutual funds and other managed asset products
"In Game Modules" coined by Robinson Technologies
Kingman Airport in Kingman, Arizona (IATA Code: IGM)
Institut Gaspard Monge
Industrial Ghetto Metal, a multi-genre band out of Memphis

Translation

The word "IGM" occurs as such in the following languages: English, German, French, Italian.