nipple
noun
ˈnɪpəl
noun
1
the
small
dark
circular
part
of
a
woman’s
breast.
Babies
suck
milk
through
their
mother’s
nipples.
〔女人的〕乳头
2
one
of
the
two
small
dark
circular
parts
on
a
man’s
chest
〔男人的〕乳头
3
the
rubber
part
on
a
baby’s
bottle
that
a
baby
sucks
milk
through
[美] 〔奶瓶的〕橡皮奶嘴;
AmE BrE
4
a
part
in
an
engine
or
machine
made
of
rubber
or
plastic
and
shaped
like
a
nipple.
It
has
a
hole
in
it
which
liquid
can
flow
or
be
poured
through.
〔发动机或机器上的〕（乳头状）注油口，加油嘴