1. 
   OA
   Officers` Association
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   OA
   Osteoarthritis.
   Found op http://www.astrazeneca.com/ncm.xhtml?node=glossary&letter=14
   
   
3. 
   Oa
   (from the article `Romania`) ...these offer some magnificent scenery. This portion of the Carpathians is bounded on the eastern side by a zone of softer flysch. For some 250 ...
   Found op http://www.britannica.com/eb/a-z/o/1
   
   
4. 
   OA
   Oil-Air, a cooling classification for transformers now classified as ONAN. Oil type, Natural convection flow through cooling equipment and in windings, & Air external cooling medium.
   Found op http://www.youngco.com/young2.asp?ID=4&Type=3
   
   
5. 
   Oa
   Oa is a fictional planet that lies at the center of the DC Comics universe. Since its inception, Oa has been the planetary citadel of the Guardians of the Universe and the headquarters of the Green Lantern Corps. It first appeared in Green Lantern vol 2 #1, when the Guardians summoned Hal`s `energy...
   Found op http://en.wikipedia.org/wiki/Oa
   
   
6. 
   OA
   Type: Abbreviation Definitions: 1. Abbreviation for occipitoanterior position.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=62005
   
   
7. 
   OA
   Opportunity Attack, see Attack of Opportunity
   Found op http://rpggeek.com/wiki/page/RPG_Glossary
   
   
8. 
   oa
   1) Removed a stet
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/oa/1
   
   

Tip: double click on a word to show its meaning.