| X | (geology) a piece of rock of different origin from the igneous rock in which it is embedded |
|---|---|
| X | a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts |
| X | Greek philosopher (560-478 BC) |
| X | an irrational fear of foreigners or strangers |
| X | suffering from xenophobia |
| X | Greek general and historian |
| X | in some classifications the family of the genus Xenopus which is otherwise included in the family Pipidae |
| X | African clawed frog |
| X | native to Africa |
| X | East Indian and Australian storks |
| X | large mostly white Australian stork |
| X | monotypic family of Mexican lizards |