laser
noun
ˈleɪzə
noun
1
a
piece
of
equipment
that
produces
a
powerful
narrow
beam
of
light
that
can
be
used
in
medical
operations,
to
cut
metals,
or
to
make
patterns
of
light
for
entertainment
激光器
laser
surgery
激光（外科）手术
2
a
beam
of
light
produced
by
a
laser
激光