Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The furthest point of an astronomical object in an elliptical orbit to its center of attraction (the principal focus of the ellipse)

from The Century Dictionary and Cyclopedia

  • n. In the orbit of a heavenly body, the point most distant from the body or point around which it revolves.
  • n. In biology, an organism or organ which may be regarded as a specialized or divergent descendant from a more primitive or less specialized organism or organ.

Etymologies

apo- +‎ center (Wiktionary)

Examples

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