HGD, or hgd, may refer to:

Medical science Hymenoptera Genome Database, a resource supporting the genomics of Hymenoptera Homogentisate 1,2-dioxygenase, an enzyme which catalyzes the conversion of homogentisate to 4-maleylacetoacetate 2-hydroxymethylglutarate dehydrogenase (HgD), an enzyme belonging to the family of oxidoreductases

Transport HGD, the Amtrak code for Huntingdon (Amtrak station), Pennsylvania, United States HGD, the IATA code for Hughenden Airport, Queensland, Australia HGD, the ICAO code for Hangard Airlines, a defunct Mongolian airline HGD, the National Rail code for Hungerford railway station in the county of Berkshire, UK

See also