phenyl

 
Pronunciation: /ˈfiːnʌɪl, ˈfɛnɪl/

noun

[as modifier] Chemistry
  • of or denoting the radical C6H5, derived from benzene by removal of a hydrogen atom: a phenyl group

Origin:

mid 19th century: from French phényle, from Greek phaino- 'shining' (because first used in names of compounds denoting by-products of the manufacture of gas used for illumination)