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Pico

释义 Definition

**pico-**：国际单位制（SI）中的词头，表示 10（万亿分之一），常用于计量极小的量（如皮秒、皮法等）。也可作专有名词（人名、地名等）使用。

发音 Pronunciation

/piko/（AmE）, /pik/（BrE）

例句 Examples

A picosecond is one trillionth of a second.
皮秒是一万亿分之一秒。

Modern electronics can switch in just a few picoseconds, enabling extremely fast computing.
现代电子器件只需几皮秒就能完成切换，从而实现极高速计算。

词源 Etymology

pico- 作为 SI 词头于 20 世纪被正式采用，来源通常被认为与意大利语 piccolo（“很小的”）相关，用来系统化表示“极小数量级”的单位前缀。

相关词 Related Words

文学与著名作品 Literary Works

*The International System of Units (SI Brochure)*（国际单位制官方手册，系统列出包括 pico- 在内的词头）
CRC Handbook of Chemistry and Physics（化学与物理常用参考书，涉及大量以 pico- 为词头的单位与数据）
The Feynman Lectures on Physics（《费曼物理学讲义》；物理语境中常出现以 pico- 构成的单位，如 picosecond、picofarad 等）

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