backflow

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Related to pyelovenous backflow: pyelosinus backflow

backflow

[′bak‚flō]
(civil engineering)
The flow of water or other liquids, mixtures, or substances into the distributing pipes of a potable supply of water from any other than its intended source.
(fluid mechanics)
Any flow in a direction opposite to the natural or intended direction of flow.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

backflow

1. The flow of water or other liquids, mixtures, or substances into the distributing pipes of a potable supply of water from any other than its intended source. Also see back siphonage
2. Any flow in a direction opposite to the natural or intended direction of flow.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.