accelerator
noun
əkˈseləreɪtə
noun
1
the
part
of
a
car
or
other
vehicle
that
you
press
with
your
foot
to
make
it
go
faster
〔车辆的〕加速装置，油门;
AmE
2
a
large
machine
used
to
make
extremely
small
pieces
of
MATTER
1(3)
move
at
extremely
high
speeds
[术语] 粒子加速器
technical