Science (noun)

1. A systematic and practical approach to knowledge, especially through observation and experiment.
2. A particular branch of study concerned with the physical or material world and its phenomena.

Origin:

Late middle english (denoting knowledge or learning): from old french, from latin scientia, from scire "know".

Examples:

1. The science of genetics has advanced greatly in recent years.
2. She has a degree in computer science.
3. The science of climate change is still a matter of debate.
4. The new discovery has important implications for the field of science.
5. The science of psychology seeks to understand human behavior.