oo

Pronunciation: /ˈəʊ.əʊ/

The English word “oo” has 2 meanings listed here.

noun

(Ω, ω) The Greek letter omega.
Any of four Hawaiian birds of the genus Moho, formerly classed with the honeyeaters and now believed to be extinct.

Representation of a long-o sound.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.