optical fibre vs British spelling

optical fibre and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
optical fibre	Yes	No	No	No
British spelling	Yes	No	No	No

optical fibre (noun)	British spelling (noun)
a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')