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Glossary of Energy Terms
beginning with letter A
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active Tweet Definition of active Like Definition of active on Facebook
noun
  1. A person or thing that is acting or capable of acting.
adjective (WikiSaurus?-link, active)
  1. Having the power or quality of acting; causing change; communicating action or motion; acting; — opposed to passive, that receives; as, certain active principles; the powers of the mind.
  2. Quick in physical movement; of an agile and vigorous body; nimble; as, an active child or animal.
  3. In action; actually proceeding; working; in force; — opposed to quiescent, dormant, or extinct.
active laws
active hostilities
an active volcano
  1. Given to action; constantly engaged in action; energetic; diligent; busy; — opposed to dull, sluggish, indolent, or inert; as, an active man of business; active mind; active zeal.
  2. Requiring or implying action or exertion; — opposed to sedentary or to tranquil; as, active employment or service; active scenes.
  3. Given to action rather than contemplation; practical; operative; — opposed to speculative or theoretical; as, an active rather than a speculative statesman.
  4. Brisk; lively; as, an active demand for corn.
  5. Implying or producing rapid action.
an active disease
an active remedy
  1. (grammar)
  1. Applied to a form of the verb; — opposed to passive. See active voice.
  2. Applied to verbs which assert that the subject acts upon or affects something else; transitive.
  3. Applied to all verbs that express action as distinct from mere existence or state.
  4. (italbrac, gay sexual slang)
  5. (italbrac, of a homosexual man) enjoying a role in anal sex in which he penetrates, rather than being penetrated by his partner
  6. such a role in anal sex
atom Tweet Definition of atom Like Definition of atom on Facebook
noun
  1. (obsolete) The smallest mediaeval unit of time, equal to fifteen ninety-fourths of a second.
  2. (historical) A theoretical particle of matter, imagined to be incapable of further division; the smallest possible unit of substance.
  3. (physics) The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
  4. (mathematics) A non-zero member of a wikipedia:Boolean algebra, Boolean algebra that is not a union of any other elements.
  5. The smallest, indivisible constituent part or unit of something.

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