From Longman Dictionary of Contemporary Englishphotosynthesispho‧to‧syn‧the‧sis /ˌfəʊtəʊˈsɪnθɪsɪs $ ˌfoʊtəˈsɪn-/ noun [uncountable] technical HBthe 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) —photosynthesize verb [intransitive, transitive]
Examples from the Corpus
photosynthesis• We will look again at photosynthesis on page 93.• The processes by which light energy is thus harnessed are collectively called photosynthesis.• The secret of the remarkable production by plants of both oxygen and organic food substances is of course photosynthesis.• Membrane damage can slow down photosynthesis quite substantially.• One tube is not enough to provide the necessary light energy for photosynthesis.• It is a raw material necessary for photosynthesis.• Plants use carbon dioxide in photosynthesis to feed themselves.• Leaves are a rich source of vitamin C and the vitamin is particularly concentrated within chloroplasts, the organelles of photosynthesis. 