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.
Nursing Degree Guide. Neonatal Nursing. Neonatal nursing involves the care for neonates, or infants, in the first 28 days of life. These infants may be healthy, or may also be in need of specialized care, with either chronic health problems or acute, life-threatening illnesses.