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单词 trunnion
释义

Definition of trunnion in English:

trunnion

noun ˈtrʌnjənˈtrənjən
  • 1A pin or pivot forming one of a pair on which something is supported.

    Example sentencesExamples
    • The introduction of trunnions, the pivots in the middle of the barrel permitting it to move independently of the carriage, was a simple but important development.
    • The bearings for lower shaft consist of solid bushings fastened into trunnion, and are provided with oil-chamber and capillary felt, making them practically self-oiling and dust-proof.
    • The receiver is thicker, and it has a reinforced trunnion.
    • The main frame of this machine is fitted at its base with trunnions, which work in a foundation plate.
    • Although the compass carries no maker's marks, it is designed to fit across the transit's trunnions and has a pin that fits a hole on the transit.
    Synonyms
    central shaft, fulcrum, axis, axle, swivel, pin, hub, spindle, hinge, pintle, kingpin, gudgeon
    1. 1.1 A supporting cylindrical projection on each side of a cannon or mortar.
      Example sentencesExamples
      • At the top of the platform, the turntable and trunnions of the gun mount are still there, but the anti-aircraft machine guns are gone.
      • The barrel and breech have been salvaged, so all that remains at the top are a pair of trunnions.
      • The gun is fitted with a trunnion mounted telescopic sight for direct firing up to 3,000m.
      • As with the machine-gun platform, the turntable and trunnions are intact, but the gun itself is missing.

Origin

Early 17th century: from French trognon 'core, tree trunk', of unknown origin.

 
 

Definition of trunnion in US English:

trunnion

nounˈtrənyənˈtrənjən
  • 1A pin or pivot forming one of a pair on which something is supported.

    Example sentencesExamples
    • Although the compass carries no maker's marks, it is designed to fit across the transit's trunnions and has a pin that fits a hole on the transit.
    • The bearings for lower shaft consist of solid bushings fastened into trunnion, and are provided with oil-chamber and capillary felt, making them practically self-oiling and dust-proof.
    • The receiver is thicker, and it has a reinforced trunnion.
    • The main frame of this machine is fitted at its base with trunnions, which work in a foundation plate.
    • The introduction of trunnions, the pivots in the middle of the barrel permitting it to move independently of the carriage, was a simple but important development.
    Synonyms
    central shaft, fulcrum, axis, axle, swivel, pin, hub, spindle, hinge, pintle, kingpin, gudgeon
    1. 1.1 A supporting cylindrical projection on each side of a cannon or mortar.
      Example sentencesExamples
      • At the top of the platform, the turntable and trunnions of the gun mount are still there, but the anti-aircraft machine guns are gone.
      • The barrel and breech have been salvaged, so all that remains at the top are a pair of trunnions.
      • As with the machine-gun platform, the turntable and trunnions are intact, but the gun itself is missing.
      • The gun is fitted with a trunnion mounted telescopic sight for direct firing up to 3,000m.

Origin

Early 17th century: from French trognon ‘core, tree trunk’, of unknown origin.

 
 
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更新时间:2025/1/11 8:09:25