eco·nom·ic /ˌɛkəˈnɑmɪk, ˌikə-/
 (a.)經濟上的,實用的,節省的


 economic
 經濟


 E·co·nom·ic E·co·nom·ic·al a.
 1. Pertaining to the household; domestic. “In this economical misfortune [of ill-assorted matrimony.]”
 2. Relating to domestic economy, or to the management of household affairs.
 And doth employ her economic art
 And busy care, her household to preserve.   --Sir J. Davies.
 3. Managing with frugality; guarding against waste or unnecessary expense; careful and frugal in management and in expenditure; -- said of character or habits.
 Just rich enough, with economic care,
 To save a pittance.   --Harte.
 4. Managed with frugality; not marked with waste or extravagance; using the minimum of time or effort or resources required for effectiveness; frugal; -- said of acts; saving; as, an economical use of money or of time; an economic use of home heating oil. [wns=3]
 5. of or pertaining to the national or regional economy; relating to political economy; relating to the means of living, or the resources and wealth of a country; relating to the production or consumption of goods and services of a nation or region; as, economic growth; economic purposes; economical truths; an economic downturn.
    These matters economical and political.   --J. C. Shairp.
    There was no economical distress in England to prompt the enterprises of colonization.   --Palfrey.
    Economic questions, such as money, usury, taxes, lands, and the employment of the people.   --H. C.  Baird.
 6. Regulative; relating to the adaptation of means to an end.
 Note: ☞ Economical is the usual form when meaning frugal, saving; economic is the form commonly used when meaning pertaining to the management of a household, or of public affairs.

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 economic
      adj 1: of or relating to an economy, the system of production and
             management of material wealth; "economic growth";
             "aspects of social, political, and economical life"
             [syn: economical]
      2: of or relating to the science of economics; "economic
         theory"
      3: concerned with worldly necessities of life (especially
         money); "he wrote the book primarily for economic
         reasons"; "gave up the large house for economic reasons";
         "in economic terms they are very privileged"
      4: financially rewarding; "it was no longer economic to keep
         the factory open"; "have to keep prices high enough to
         make it economic to continue the service"
      5: using the minimum of time or resources necessary for
         effectiveness; "an economic use of home heating oil"; "a
         modern economical heating system"; "an economical use of
         her time" [syn: economical]