砝 (fǎ): (in 砝码) a standard weight used…

Meanings

她在右盘加了一个十克的砝码。

Tā zài yòu pán jiā le yí gè shí kè de fǎmǎ.

She added a ten-gram weight to the right-hand pan.

这套铜砝码必须保持洁净准确。

Zhè tào tóng fǎmǎ bìxū bǎochí jiéjìng zhǔnquè.

The set of brass weights must be kept clean and accurate.

usage

Bound form — 砝 occurs only in 砝码, the calibrated metal weights placed on a balance scale to measure an object against a known mass.

radical

石 shí

stone

Left side is the stone radical 石, since the earliest standard weights were carved from stone before metal ones replaced them.

phonetic

法 fǎ

law; method; sound element

Right side 法 supplies the reading fǎ exactly, and its 'standard / rule' sense fits a calibrated measuring weight.

砝 fǎ