water pipe

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A pipe that is a conduit for water.
• noun An apparatus for smoking, such as a hookah, in which the smoke is drawn through a container of water or ice and cooled before inhaling.

from The Century Dictionary.

• noun A pipe for conveying water. Wright Vocabulary.
• noun A waterspout.
• noun A narghile or hooka.

from the GNU version of the Collaborative International Dictionary of English.

• A pipe for conveying water.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A pipe that is a conduit for water; an essential element of plumbing.
• noun A device for smoking, such as a hookah or bong, in which the smoke is drawn through a container of water before inhaling.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an oriental tobacco pipe with a long flexible tube connected to a container where the smoke is cooled by passing through water