noun
- The apparent radius of a celestial body when viewed as a disc from the earth. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). semidiameter. Retrieved September 23, 2026, from http://smartdefine.org/semidiameter/definitions/1211615 |
| Chicago | WordNet. 2010. "semidiameter" http://smartdefine.org/semidiameter/definitions/1211615 (accessed September 23, 2026). |
| Harvard | WordNet 2010, semidiameter, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/semidiameter/definitions/1211615>. |
| MLA | WordNet. "semidiameter" 23 October 2010. Web. 23 September 2026. <http://smartdefine.org/semidiameter/definitions/1211615> |