half-link
nounUK /ˈhɑːf lɪŋk/
US /ˈhæf lɪŋk/
A half-link is a small metal piece shaped like a U that joins two parts of a chain together.
The mechanic replaced the broken half-link so the chain would work again.
OTHER MEANINGS
2. In cycling, a half-link is a special chain link used to adjust the length of a bicycle chain.
He added a half-link to his bike chain so the wheel would sit in the right spot.
3. In jewelry, a half-link can mean a single open loop used to repair or extend a chain.
She fixed her necklace with a tiny half-link from the repair kit.
4. In wrestling, a half-link is a type of hold where one arm is bent behind the opponent's back.
The wrestler used a half-link to keep his opponent from escaping.