| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Marriage--Bibl | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage (Canon law) | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage customs and rites | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage endowment insurance | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage--Jews | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage law | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage licenses | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage, Morganatic | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage--Prohibited degrees | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage registers | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage service | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage service: Missals | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriages, International | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriages of royalty and nobility | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage statistics | No definition provided | Christopher Rauch | 2023.12.01 |
| Marriage with deceased wife’s sister | No definition provided | Christopher Rauch | 2023.12.01 |
| Marrite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Marrow | No definition provided | Christopher Rauch | 2023.12.01 |
| Marrucciite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Mars | Fourth planet from Sun and the seventh largest. Mass 6.42 x 10^26 g (0.11 Earth's); radius 3397 km. Mean distance from Sun 1.52 AU. Sidereal period 687 days; synodic period 779.9 days. Surface tempera ture 248 K., rotational period 24h 37m 22.66s. Obliquity 23°59'. Atmosphere more than 90% CO_2, traces of O_2, CO, H_{2}O. Two tiny satellites (Phobos and Deimos), both of which are locked in synchronous rotation with Mars. | Ryan McGranaghan | 2023.04.16 |