cement mixer

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A machine, often mounted on a truck, having a revolving drum in which cement, sand, gravel, and water are combined into concrete.

Wiktionary

1. n. A device used in construction in whicb cement, aggregate and water are slowly mixed together in a revolving drum to form concrete.
2. n. A cocktail made of Irish cream and lime juice or lemon juice.

WordNet 3.0

1. n. a machine with a large revolving drum in which cement is mixed with other materials to make concrete