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.
NICU is an acronym that stands for Neonatal Intensive Care Unit. The NICU is the department of the hospital which cares for prematurely born babies (neonates) who are not fully developed, and therefore are unable to survive on their own without the assistance of monitoring equipment, incubators, and breathing apparatus.