English sweet orange English Wikipedia has an article on:sweet orangeWikipedia Wikispecies has information on: Citrus sinensis Wikispecies Pronunciation Audio (US):(file) Noun sweet orange (plural sweet oranges) Citrus sinensis, a species of citrus fruit, commonly known as the orange. Synonym: coolie orange Hyponyms: blood orange, navel orange, Valencia orange Wikiwand - on Seamless Wikipedia browsing. On steroids.