different between labelled vs hexadeuterobenzene

English

labelled (not comparable) (British spelling)

Having a label, tagged.
The butterfly collection had each specimen labelled with the scientific name on a little piece of paper.
Defined or described (as).
He was labelled a racist for his remarks.

labelled (British spelling)

simple past tense and past participle of label
I've labelled the file and put it on your desk.

This spelling is used in British and Canadian English. In the United States, the spelling labeled is preferred.

hexadeuterobenzene (uncountable)

(organic chemistry) An isotopically labelled form of benzene in which every hydrogen atom has been replaced by deuterium

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