Definition of fluorescent adjective from the Oxford Advanced Learner's Dictionary

     

    fluorescent

     adjective
    adjective
    BrE BrE//ˌflɔːˈresnt//
     
    ; NAmE NAmE//ˌflɔːˈresnt//
     
    ; BrE also BrE//ˌflʊəˈresnt//
     
    ; NAmE also NAmE//ˌflʊˈresnt//
     
     
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  1. 1(of substances) producing bright light by using some forms of radiation a fluorescent lamp (= one that uses such a substance) fluorescent lighting
  2. 2(of a colour, material, etc.) appearing very bright when light shines on it; that can be seen in the dark fluorescent armbands worn by cyclists cyclists wearing fluorescent orange and yellow armbands Synonymsbrightbrilliant vivid vibrantThese words all describe things that are shining or full of light or colours that are strong and easy to see.bright full of light; shining strongly; (of colours) strong and easy to see:a bright yellow dressbrilliant very bright:The sky was a brilliant blue.vivid (approving) (of colours) bright and strong:His eyes were a vivid green.vibrant (approving) (of colours) bright and strong:The room was decorated in vibrant blues and greens.vivid or vibrant? These two words are very similar, but vivid emphasizes how bright a colour is, while vibrant suggests a more lively and exciting colour or combination of colours.Patterns bright/​brilliant/​vivid/​vibrant colours bright/​brilliant light/​sunlight/​sunshine/​eyes compare phosphorescent
See the Oxford Advanced American Dictionary entry: fluorescent