Water is a transparent and nearly colorless chemical substance that is the main constituent of Earth's streams, lakes, and oceans, and the fluids of most living organisms. Its chemical formula is H2O, meaning that its molecule contains one oxygen and two hydrogen atoms, that are connected by covalent bonds.
1. recently born; called also neonatal. 2. newborn infant. postmature newborn (post-term newborn) post-term infant. premature newborn (preterm newborn) preterm infant.
A Neonatal Intensive Care Unit (NICU) is a special area of the hospital that is devoted to the care of critically ill babies. Typically a NICU is completely separated from the nursery for healthy newborns, and may not even be in the same building (the nursery is always located near the rooms for the mothers).