Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Origin: fluorspar, type of fluorescent mineral (18-21 centuries), from Modern Latin fluor 'mineral used for melting', from Latin fluere 'to flow'

fluorescent

adjective
     
Related topics: Colours, Power, Electricity
flu‧o‧res‧cent
1CCTP fluorescent colours are very bright and easy to see, even in the dark:
a fluorescent pink T-shirt
2 a fluorescent light contains a tube filled with gas, which shines with a bright light when electricity is passed through it
fluorescence noun [uncountable]

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary