prism
noun
ˈprɪzəm
noun
1
a
transparent
block
of
glass
that
breaks
up
white
light
into
different
colours
棱镜
2
a
solid
object
with
matching
ends
and
several
sides
which
are
the
same
width
all
the
way
up
[术语] 棱柱（体）
technical