正子 (zhèng zǐ) — (physics) positron, antielectron | tongtong Chinese Dictionary

Definition

noun

(physics) positronantielectron

Examples

正子，。
zhèng zǐ Shì diàn zǐ de fǎn lì zǐ, dài zhèng diàn hè.
A positron is the antiparticle of an electron, carrying a positive charge.
PET，正子。
Zài PET sǎo miáo zhōng, zhèng zǐ yǔ diàn zǐ yān miè chǎn shēng guāng zǐ.
In PET scanning, positrons and electrons annihilate to produce photons.
正子。
Kē xué jiā zài shí yàn shì lǐ chéng gōng chǎn shēng le zhèng zǐ shù.
Scientists successfully produced a positron beam in the lab.

Origin

Compound word

构词法gòucífǎ

偏正piānzhèngModifier + head

The first part narrows down the second: it says what kind of thing the head is.

正zhèngpositive

子zǐparticle

正 means positive and 子 means particle, so the term names the positive particle.

Characters in this word

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

Meaning part形符xíngfú

Sound part声符shēngfú

丁

丁dīng正zhèng

Same sound today

正 pairs 止 with 丁; 止 marks the sense and 丁 gives the sound.

A drawing of the thing itself, worn down over three thousand years into a few strokes.

子 is drawn as a baby with a large head, arms stretched out, and legs wrapped in a blanket.

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