photosynthesis
noun
ˌfəʊtəʊˈsɪnθɪəsɪəs
noun
1
the
production
by
a
green
plant
of
special
substances
like
sugar
that
it
uses
as
food,
caused
by
the
action
of
sunlight
on
CHLOROPHYLL
(=the
green
substance
in
leaves)
[术语] 光合作用