Search BSB. Hydrogen: Chemical element with atomic number 1. Symbol: H H is the lightest, most abundant chemical element H makes up about 75 % of the Universe's elemental mass. Hydrogen = H Hydro = Greek = water gene = Greek = creating Hydrogen has a simple atomic structure-one proton + one an electron.
Wiktionary (0.00 / 0 votes) Rate this definition: dilapidation (Noun). The state of being dilapidated, reduced to decay, partially ruined. dilapidation (Noun). The act of dilapidating, damaging a building or structure through neglect or by intention.
Full Definition of SEPARATION. 1. : the act or process of separating: the state of being separated. 2. a: a point, line, or means of division.3. a: cessation of cohabitation between a married couple by mutual agreement or judicial decree b: termination of a contractual relationship (as employment or military service).edical Definition of SEPARATION. 1. : the process of isolating or extracting from or of becoming isolated from a mixture; also: the resulting state.