infinitesimal

英 /ˌɪnfɪnɪˈtesɪml/ 　美 /ˌɪnfɪnɪˈtesɪməl/

adj. 极其微小的so small that it is almost impossible to measure
n. 无穷小量a mathematical quantity smaller in magnitude than any positive real number

The scratch made an infinitesimal difference to the table's appearance.

这道划痕对桌子外观的影响微乎其微。

Even infinitesimal changes in ocean temperature can become significant when measured across vast areas over decades.

即使海水温度变化极其微小，若在广阔海域持续数十年，也可能产生显著影响。

搭配

infinitesimal amount 极微小的量infinitesimal difference 极微小的差别infinitesimal change 极微小的变化

比small语气强得多；名词用法主要见于数学。

infinitesimally (adv.)