cathodoluminescence

[kath-uh-doh-loo-muh-nes-uhns]

cath·o·do·lu·mi·nes·cence

[kath-uh-doh-loo-muh-nes-uhns]
noun
light emitted by a substance undergoing bombardment by cathode rays.

Origin:
1905–10; cathode + -o- + luminescence

cath·o·do·lu·mi·nes·cent, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Cathodoluminescence has a plethora of syllables.
So is dichlorodiphenyltrichloroethane. Does it mean:
(used as a nonsense word by children to express approval or to represent the longest word in English.)
a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S.
Collins
World English Dictionary
cathodoluminescence (ˌkæθədəʊˌluːmɪˈnɛsəns)
 
n
physics luminescence caused by irradiation with electrons (cathode rays)

Collins English Dictionary - Complete & Unabridged 10th Edition
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