Englishfor English speakers
efficiency
Noun
—
Efficiency is the state or quality of being efficient.
—
Efficiencies are steps that can be taken to make things more efficient.
booster
—
noun
an additional dose that makes sure the first dose was effective
—
noun
the first stage of a multistage rocket
—
noun
an amplifier for restoring the strength of a transmitted signal
—
noun
a thief who steals goods that are in a store
—
noun
(= promoter)
someone who is an active supporter and advocate
—
noun
(= supporter, friend)
a person who backs a politician or a team etc
all their supporters came out for the game
they are friends of the library
diode
—
noun
a semiconductor that consists of a p-n junction
—
noun
a thermionic tube having two electrodes; used as a rectifier