Water

**Definition:** A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

**Tree numbers:** - D01.045.250.875 - D01.248.497.158.459.650 - D01.650.550.925

**Synonyms:** - Hydrogen Oxide