Infinitesimal



GRE Barron

解释

GRE 红宝书

• adj. 极微小的n.极小的数
• ［英］ adj. 极微小的 ( infinitely small) ;
• ［记］ infinite ( 无穷的) +simal -> 无穷小的

Webster Collegiate

I. noun

• Etymology: New Latin infinitesimus infinite in rank, from Latin infinitus
• Date: 1706
• an infinitesimal quantity or variable

II. adjective

• Date: 1710
• 1. taking on values arbitrarily close to but greater than zero
• 2. immeasurably or incalculably small <an infinitesimal difference>
• ? infinitesimally adverb

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