Definition

1. Noun:
   • The precise central point; the exact middle: "Dead center" refers to the point of perfect alignment or balance, often implying no movement or force is being applied.
   • A mechanical position: In an engine, "dead center" is the position of a piston when it is at the extreme top or bottom of its stroke, where the connecting rod and crank are in a straight line and no turning force is produced.

Usage Examples

• Noun:
  • The arrow hit the target's dead center. (The arrow hit the exact middle of the target.)
  • When the piston is at dead center, the engine cannot start without an external force. (When the piston is at the point of no torque, the engine is stalled.)
  • He parked the car dead center in the garage. (He parked the car perfectly in the middle of the garage space.)

Advanced Usage

• "Top dead center (TDC)" and "Bottom dead center (BDC)": These are specific technical terms in internal combustion engines. TDC is the highest position of the piston, and BDC is the lowest.
  • The timing mark indicates when the piston is at top dead center.
• Used figuratively to mean the absolute focus or central point of something.
  • The controversy was dead center in the public debate. (The controversy was the absolute core of the discussion.)

Variants and Related Words

• Dead centre: The British English spelling variant.
• Center point: A more general term for the middle.
• Neutral position: A position where no force or movement is generated.

Synonyms

• Bullseye
• Exact center
• Midpoint
• Heart

Related Phrases

• Dead on center: An emphatic form meaning perfectly centered.
  • The alignment was dead on center.
• To be dead center in the crosshairs: An idiomatic expression meaning to be the precise, focused target.
  • The company's CEO was dead center in the crosshairs of the investigation.

Noun

1. the position of a crank when it is in line with the connecting rod and not exerting torque