1. 
   Tertial
   Ter'tial adjective & noun [ From Latin tertius third, the tertial feathers being feathers of the third row. See Tierce .] (Zoology) Same as Tertiary .
   Found op http://www.encyclo.co.uk/webster/T/31
   
   
2. 
   tertial
   <zoology> Same as Tertiary. ... Origin: From L. Tertius third, the tertial feathers being feathers of the third row. See Tierce. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?tertial
   
   
3. 
   Tertial
   • (a. & n.) Same as Tertiary.
   Found op http://thinkexist.com/dictionary/meaning/tertial/
   
   
4. 
   tertial
   1) Certain wing feather
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/tertial/1
   
   

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