from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The point of greatest separation between two stars, especially in a binary star situation.
from the GNU version of the Collaborative International Dictionary of English
- n. That point in the orbit of a double star where the smaller star is farthest from its primary.
from The Century Dictionary and Cyclopedia
- n. In astronomy, that part in the orbit of a double star where it is furthest from its primary.
apo- + astron (Wiktionary)