🇨🇳Chinese Source WordCode: ZH

摇臂

Pronunciation / Transliteration: yáobì

🇬🇧 Direct English Meaning:
Rocker-Arm/ˈrɒkər ɑrm/
nounCEFR B2 (Upper)Top #15000 frequency
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🇨🇳 Example Sentence in Chinese:

"摇臂在发动机中起着重要作用。"

Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A lever that transmits motion, typically used in engines to convert rotational motion into linear motion.

    "The mechanic replaced the faulty rocker-arm to restore the engine's performance."
  2. 2

    A component in a valve train of an internal combustion engine that opens and closes the engine's valves.

    "The rocker-arm assembly is crucial for the proper functioning of the engine's intake and exhaust systems."

Thesaurus & Semantic Spectrum

Synonyms (3)
Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The term 'rocker-arm' originates from the combination of 'rocker', which comes from the Middle English 'rokker', meaning to rock or sway, and 'arm', derived from Old English 'earm', referring to a limb or lever. The term evolved in the context of mechanical engineering in the late 19th century, referring to a lever that rocks back and forth to transmit motion.

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