BDH

BDH is a three-letter abbreviation that may refer to:
 * The AMEX code for ML BRDBND HLDR12/40 (a broadband diversification instrument).
 * The National Rail station code for Bedhampton railway station, Havant, England
 * Beta-hydroxyDeHydrogenase, enzyme that takes beta-Hydroxybutyric acid as a substrate
 * Peace and Democracy Movement (Bariş ve Demokrasi Hareketi), a political party in the Turkish Republic of Northern Cyprus
 * Big Children's Choir (Большой Детский Хор), one of the most popular children's choirs in the ex-USSR.
 * The Brown Daily Herald, the student newspaper of Brown University
 * British Drug Houses, a big chemical company that was merged with Merck KGaA
 * Bryce Dallas Howard, actress in Jurassic World, The Village, Spider-Man 3, Terminator Salvation, and Twilight Saga: Eclipse, et al.
 * Big Damn Heroes, characters and cast from the TV show Firefly and movie Serenity.