BTD (disambiguation)

BTD may refer to:

• "BTD (Before the Dawn)", a 2011 song by the South Korean boy band Infinite
• Bloons Tower Defense, a series of tower defense games
• Biotinidase, an enzyme encoded by the BTD gene
• British trade dollar, a silver coin minted by Great Britain to facilitate trade with the Far East
• Douglas BTD Destroyer, the 1940s American torpedo/dive-bomber