Roman god of war, also the name of the bright red planet, late 14c., from Latin Mars (stem *Mawort-), the Roman god of war, of unknown origin, apparently from earlier Mavors, related to Oscan Mamers. According to Watkins the Latin word is from *Mawort- "name of an Italic deity who became the god of war at Rome ...." He also had agricultural attributes, and might ultimately have been a Spring-Dionysus. The planet was so named by the Romans, no doubt for its blood-like color. The Greeks also called the planet Pyroeis "the fiery."
例文
1. Mars has an insubstantial atmosphere，consisting almost entirely of carbon dioxide.
火星の大気層は極めて薄く、ほぼすべて二酸化炭素で構成されている。
2.The planet Mars will be visible to the naked eye all week.
全周にわたって肉眼で火星を観察することができる。
3. Mars was visible,dead in the centre of the telescope.
火星が見え、望遠鏡の真ん中にある。
4.He stole a Mars bar from the school tuck shop.
彼は学校の軽食店からマースチョコレートバーを盗んだ。
5. Mars takes longer to revolve on its axis than the earth.