The Collaborative International Dictionary of English v.0.48:

Predomination \Pre*dom`i*na"tion\, n. [Cf. F. pr['e]domination.]
   The act or state of predominating; ascendency; predominance.
   --W. Browne.
   [1913 Webster]

WordNet (r) 3.0 (2006):

predomination
    n 1: the state of being predominant over others [syn:
         predominance, predomination, prepotency]
    2: the quality of being more noticeable than anything else; "the
       predomination of blues gave the painting a quiet tone" [syn:
       predomination, predominance]