Pronunciation change

  • (UK) IPA (key): /ˌfəʊ.təʊˈsɪn.θə.sɪs/
  • (US) IPA (key): /ˌfoʊtoʊˈsɪnθəsɪs/
  • (file)

Noun change

Singular
photosynthesis

Plural
none

  1. (biology) Photosynthesis is the way that most plants and some other living things make their food using sunlight.