MDK
MDK is an abbreviation for:
- Gastrointestinal tract , also: gastrointestinal tract , an important part of the digestive system, see digestive tract
- Main-Danube Canal , a canal that enables a continuously navigable connection from the mouth of the Rhine in Rotterdam to the mouth of the Danube in the Black Sea
- Manic depressive illness , see bipolar disorder
- MDK (computer game) , computer game from Shiny Entertainment
- Medical service of the health insurance , a working group usually established at the state level by the state associations of the health insurance companies as an independent institution
- the pioneer machine MDK , a military tracked vehicle for digging positions, pits and anti-tank trenches