What is Anomalous expansion of water?

Answer:
The expansion of water when it is cooled from four degree centigrade to zero degree centigrade is known as "anomalous expansion of water."
The unusual behaviour of water, when it expands below
4° celsius to
0° is called anmalus expansion of water.
Note: There are comments associated with this question. See the discussion page to add to the conversation.
First answer by Raghavmundhra. Last edit by Raghavmundhra. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 0 [recommend question].