A dose of an antigen designed to strengthen immunity after an earlier immunizing dose.

(often pluralized) Synonym of jumper cable

A portable battery, fitted with cables and a charger, used to charge a dead battery, especially in a car.

plural of booster cable

Synonym of chicken cannon

plural of milking booster

A kind of booster, in a power station, used to give an additional charge to a battery cell operating with reduced capacity by "milking" the other, healthy cells.

plural of battery booster

plural of booster club

plural of booster shot