noun
- An asteroid whose orbit crosses the Earth's orbit. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). apollo asteroid. Retrieved September 21, 2026, from http://smartdefine.org/apollo_asteroid/definitions/1226577 |
| Chicago | WordNet. 2010. "apollo asteroid" http://smartdefine.org/apollo_asteroid/definitions/1226577 (accessed September 21, 2026). |
| Harvard | WordNet 2010, apollo asteroid, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/apollo_asteroid/definitions/1226577>. |
| MLA | WordNet. "apollo asteroid" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/apollo_asteroid/definitions/1226577> |