apsis Hear it!

apsis Definition

ap·sis (apsis)

noun pl. -·si·des′-sə dēz′

  1. that point in the elliptical orbit of the moon, a planet, etc. nearest to (lower apsis), or that farthest from (higher apsis), the gravitational focus point
  2. apse (sense )

Etymology: L, an arch < Gr hapsis, a fastening < haptein: see apt

apsis Idioms

line of apsides

a line joining the lower and higher apsides, forming the major axis of the orbit

Browse dictionary entries near apsis

  1. apsidal
  2. apse
  3. APS
  4. apropos
  5. apron string
  6. apron
  7. apriority
  8. April Fools' Day
  9. April fool
  10. April
  1. apt
  2. apteral
  3. apterium
  4. apterous
  5. apterygial
  6. apteryx
  7. aptitude
  8. aptitude test
  9. Apuleius
  10. Apulia