[1] : The Collaborative International Dictionary of English v.0.48

jackass \jack"ass`\, n. 2d jack + ass.
   1913 webster
   1. the male ass; a donkey.
      1913 webster

   2. a conceited dolt; a perverse blockhead; -- disparaging and
      offensive.
      1913 webster

   jackass bark naut., a three-masted vessel, with only the
      foremast square-rigged; a barkentine.

   jackass deer zool., the koba.

   jackass hare, jackass rabbit zool.. see jack rabbit,
      under 2d jack, n.

   jackass penguin zool., any species of penguin of the
      genus spheniscus, of which several are known. one
      species spheniscus demersus inhabits the islands near
      the cape of good hope; another spheniscus magellanicus
      is found at the falkland islands. they make a noise like
      the braying of an ass; -- hence the name.

   laughing jackass. zool. see under laughing.
      1913 webster
see also:
jackass bark jackass deer jackass hare jackass rabbit jack rabbit jack 
jackass penguin spheniscus spheniscus demersus spheniscus magellanicus laughing jackass 
laughing 

[2] : WordNet (r) 2.0

jackass penguin
     n : small penguin of south america and southern africa with a
         braying call syn: spheniscus demersus
see also:
spheniscus demersus 

Penguin >> P Words
Penguin, definition of term: Penguin
penguin_pag1.html

Jackass >> J Words
Jackass, definition of term: Jackass
jackass_pag1.html

Emperor Penguin >> E Words
Emperor Penguin, definition of term: Emperor Penguin
emperor+penguin_pag1.html

King Penguin >> K Words
King Penguin, definition of term: King Penguin
king+penguin_pag1.html