early 15c., from Latin titan, from Greek titan, member of a mythological race of giants who attempted to scale heaven by piling Mount Pelion on Mount Ossa but were overthrown by Zeus and the other gods. They descended from Titan, elder brother (or grandson) of Kronos. The name is perhaps from tito "sun, day," which probably is a loan-word from a language of Asia Minor. Sense of "person or thing of enormous size or ability" first recorded 1828. Applied to planet Saturn's largest satellite in 1831; it was discovered 1655 by Dutch astronomer Christiaan Huygens, who named it Saturni Luna "moon of Saturn." Related: Titaness; titanian.
例文
1. The largest moon， Titan ，is larger than earth.
最大の衛星， TITAN ，地球よりも大きい.
2. The thermochemical properties of reaction N ++ H 2→ NH ++ H have been computed under Titan ? ? s atmosphere conditions.
N++H 2→NH++H反応の熱化学関数を Titan 大気の圧力と温度条件に基づいて計算した。
3. TITAN ：Each plate contains agarose in barbital buffer with 0.02%thimerosal added as a presrvative. TITAN ：皿ごとにバルビタール［ジエチルプロパンジアミド尿素］緩衝剤中に寒天を含み、防腐剤として0.02%有機水銀を加えた。
4.Because Titan is Saturn 's largest moon，it held special interest for us.
土衛六は最大の衛星であるため、特に興味があります。
5.Zeus saw through the trick and felt displeased at the Titan 's favour towards men.