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Meaning of genethlialogy

ge•neth•li•al•o•gy

Pronunciation: ( ju-neth"lē-ol'u-jē, -al'-), [key]
— n. Astrol.
  1. the science of calculating positions of the heavenly bodies on nativities.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.