欧姆 (ōu mǔ) — (measure word) ohm (unit of electrical resistan…

Definition

Unit of electrical resistance (ohm). Used in physics and electronics contexts, written after a number (十欧姆) — not a general-purpose classifier.

classifier

ohm (unit of electrical resistance)

欧姆。
Zhè ge diàn zǔ shì shí ōu mǔ de.
This resistor is ten ohms.
欧姆。
Diàn lù xū yào yì bǎi ōu mǔ de diàn zǔ.
The circuit needs a hundred-ohm resistor.
欧姆。
Tā yòng de shì wǔ ōu mǔ de diàn zǔ.
He is using a five-ohm resistor.

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.

This origin belongs to the traditional form 歐; 欧 is its simplified writing.

區欠歐

Meaning part形符xíngfú

欠欠qiànto yawn; to exhale

Sound part声符shēngfú

區

區qū歐Ōu

Same sound today

The traditional form 歐 pairs 區 as a sound with 欠 (to yawn; to exhale), and was originally written for vomiting; simplified 欧 is a later shorthand.

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

女母姆

Meaning part形符xíngfú

女女nǚfemale

Sound part声符shēngfú

母

Same sound today

姆 pairs 女 (female) on the left with 母 on the right, and 母 gives the sound.