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.
Definition of neon. 1 : a colorless odorless mostly inert gaseous element that is found in minute amounts in air and is used in electric lamps â see element table. 2a : a discharge lamp in which the gas contains a large proportion of neonb : a sign composed of such lampsc : the illumination provided by such lamps or signs.