Constant



GRE TOEFL 考研

解释

GRE 红宝书

• adj. 稳定的, 不变的;n. 常数
• ［英］ adj. 稳定的, 不变的 ( unchanging) ; n. 常数 ( invariable)
• ［记］ con ( 始终) +stant ( 站, 立) -> 始终站立 -> 不变的
• ［同］ 派生词: constancy ( n. 恒定不变) ; constantly ( adv.不断地frequently)

Webster Collegiate

I. adjective

• Etymology: Middle English, from Middle French, from Latin constant-, constans, from present participle of constare to stand firm, be consistent, from com- + stare to stand — more at stand
• Date: 14th century
• 1. marked by firm steadfast resolution or faithfulness ; exhibiting constancy of mind or attachment constant friend
• 2. invariable, uniform constant flow
• 3. continually occurring or recurring ; regular constant annoyance
• Synonyms: see faithful, continual
• ? constantly adverb

II. noun

• Date: 1832
• something invariable or unchanging: as
  • a. a number that has a fixed value in a given situation or universally or that is characteristic of some substance or instrument
  • b. a number that is assumed not to change value in a given mathematical discussion
  • c. a term in logic with a fixed designation

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