'Mediety' definitions:

Definition of 'mediety'

(from WordNet)
noun
One of two (approximately) equal parts [syn: moiety, mediety]

Definition of 'Mediety'

From: GCIDE
  • Mediety \Me*di"e*ty\, n. [L. medietas.] The middle part; half; moiety. [Obs.] --Sir T. Browne. [1913 Webster] Medievalism Medieval