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.
The term neonatal comes from neo, new, and natal, pertaining to birth or origin. Neonatal nursing requires a high degree of skill, dedication and emotional strength as the nurses care for newborn infants with a range of problems, varying between prematurity, birth defects, infection, cardiac malformations and surgical problems.