MCD
- 1400
- Association for Standardisation of Automation and Measuring Systems
- Castleman's disease
- Farrar, Straus and Giroux
- M Countdown
- MCD Productions
- Mackinac Island Airport
- Macleod railway station
- Magnetic chip detector
- Magnetic circular dichroism
- Malonyl-CoA decarboxylase
- Mathcad
- Maxi single
- McDonald's
- Mega-CD
- Melbourne College of Divinity
- Merced station (Amtrak)
- Mesoscale convective discussion
- Millicandela
- Minecraft Dungeons
- Mini compact disc
- Minimal change disease
- Minor civil division
- Monte Carlo Doualiya
- Moscow Central Diameters
- Municipal Corporation of Delhi
- North Macedonia