Impulse



GRE TOEFL 考研

解释

GRE 红宝书

• n. 冲动; 刺激
• ［英］ 冲动 ( sudden inclination prompting to action) ; 刺激 ( an impelling action inducing motion)
• ［记］ im ( 在内) +pulse ( 推) -> 内推 -> 冲动
• ［同］ 同根词: repulse ( 打退;厌恶)

Webster Collegiate

I. transitive verb (impulsed; impulsing)

• Date: 1611
• to give an impulse to

II. noun

• Etymology: Latin impulsus, from impellere to impel
• Date: 1647
• 1.
  • a. inspiration, motivation
  • b. a force so communicated as to produce motion suddenly
  • c. incentive
• 2.
  • a. the act of driving onward with sudden force ; impulsion
  • b. motion produced by such an impulsion ; impetus
  • c. a wave of excitation transmitted through tissues and especially nerve fibers and muscles that results in physiological activity or inhibition
• 3.
  • a. a sudden spontaneous inclination or incitement to some usually unpremeditated action
  • b. a propensity or natural tendency usually other than rational
• 4.
  • a. the product of the average value of a force and the time during which it acts ; the change in momentum produced by the force
  • b. pulse 4a
• Synonyms: see motive

---