Source : Webster's Revised Unabridged Dictionary (1913)

Synclinorium \Syn`cli*no"ri*um\, n.; pl. {Synclinoria}. [NL.,
   fr. Gr. ? to lay together + ? mountain.] (Geol.)
   A mountain range owing its origin to the progress of a
   geosynclinal, and ending in a catastrophe of displacement and
   upturning. --Dana.

Source : WordNet®

synclinoria
     See {synclinorium}