boosters
n. countablen. extra things that increase the power, speed, or effectiveness of something. You might use this for rocket engines, extra medical shots, or even people who support a team.
n. devices, substances, or people that provide additional power, pressure, or support to a primary system. Often refers to secondary rocket engines or supplementary doses of a vaccine.
The rocket dropped its boosters after reaching space.
Health officials recommended that elderly citizens receive their boosters before the winter flu season begins.
The spacecraft relied on solid-fuel boosters to escape the planet's gravity before the main engines took over for the long journey through the vacuum of space.
Usually appears in the plural form when referring to rocket components or a group of supporters.