|mare2 (ˈmɑːreɪ, -rɪ)|
|—n , pl maria|
|1.||(capital when part of a name) any of a large number of huge dry plains on the surface of the moon, visible as dark markings and once thought to be seas: Mare Imbrium (Sea of Showers)|
|2.||a similar area on the surface of Mars, such as Mare Sirenum|
|[from Latin: sea]|
|mare (mä'rā) Pronunciation Key
Plural maria (mä'rē-ə)
Any of the large, low-lying dark areas on the Moon or on Mars or other inner planets. The lunar maria are believed to consist of volcanic basalts, and many are believed to be basins formed initially by large impacts with meteoroids and later filled with lava flows. Compare terra.