From Shakespeare's play A Midsummer-Night's Dream, the queen of the fairies. / (astronomy): The largest satellite of the planet Uranus.

(inorganic chemistry) titanium dioxide

(mythology) Of the Titans / (astronomy) Of Titan, the largest moon of Saturn. / Of the faerie queen Titania / (astronomy) Of Titania, the largest moon of Uranus.

(science fiction) An inhabitant of Titan (the Saturnian moon) or of Titania

(mineralogy) Describing minerals containing tetravalent titanium

plural of Titanian