sprocket

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun roller that has teeth on the rims to pull film or paper through
  2. noun thin wheel with teeth that engage with a chain
  3. noun tooth on the rim of gear wheel

Etymology

Unknown. First attested in the 16th century. Perhaps related to Italian rocchetto (“spool”), spoletta (“spool”), sprone (“spur”), or English spoke, spike, spur.

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