conservation
noun
[ kɒnsəˈveɪʃ(ə)n ]
• prevention of wasteful use of a resource.
• the principle by which the total value of a physical quantity or parameter (such as energy, mass, linear or angular momentum) remains constant in a system which is not subject to external influence.
Origin:
late Middle English: from Latin conservatio(n- ), from the verb conservare (see conserve).
