Definition

Noun: A small, specialized key with a square hole or tip, designed specifically for winding the mainspring of certain mechanical watches.

Usage

This term refers to a physical tool. It is used when discussing the maintenance or operation of older or specific types of mechanical timepieces that require manual winding with this dedicated key. * You need the correct watch key to wind this antique pocket watch. * The watch key was lost, so the clock could not be wound.

Advanced Usage

• Collector's Item: In horology (the study of timekeeping), antique watch keys are often collected as artifacts.
  • The auction featured a rare 18th-century watch key made of silver.

Variants and Related Words

• Winding Key: A more general term for any key used to wind a spring-driven mechanism.
• Watch Winder: A modern device that automatically rotates automatic watches to keep them wound, which is a different concept from a manual watch key.

Synonyms

• Winder
• Clock key (when used for clocks of similar design)

Notes

"Watch key" is a compound noun. Its meaning is specific and technical. It is not a commonly used term in everyday modern English, as most contemporary watches are self-winding (automatic) or use a crown for manual winding, not a separate key.

Noun

1. winder consisting of a key with a square hole; used for winding some watches