
1) Primary avionics control unit
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https://www.crosswordclues.com/clue/pacu

Pacu (paˈku) is a common name used to refer to several common species of omnivorous South American freshwater fish that are related to the piranha. Pacu and piranha do not have similar teeth, the main difference being jaw alignment; piranha have pointed, razor-sharp teeth in a pronounced underbite, whereas pacu have squarer, straighter teeth, lik...
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http://en.wikipedia.org/wiki/Pacu

• (n.) A South American freah-water fish (Myleies pacu), of the family Characinidae. It is highly esteemed as food.
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http://thinkexist.com/dictionary/meaning/pacu/

(from the article `South America`) ...diverse community is found in the Amazonian and Guianan forests, where the abundance of water and trees makes life easy. Rivers are the realm of ... ...a salmon), the surubí (a fish with a long rounded body, flattened at the nose), the patí (a large, scaleless river fish that frequents...
Found on
http://www.britannica.com/eb/a-z/p/3

postanesthesia care unit.
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http://www.encyclo.co.uk/local/21001

Primary Avionics Control Unit
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http://www.encyclo.co.uk/visitor-contributions.php
Pa'cu noun (Zoology) A South American freah-water fish (
Myleies pacu ), of the family
Characinidæ . It is highly esteemed as food.
Found on
http://www.encyclo.co.uk/webster/P/2

Type: Abbreviation Definitions: 1. Abbreviation for postanesthesia care unit.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=64410
No exact match found.