Strong's #2934: ktenos (pronounced ktay'-nos)
 from 2932; property, i.e. (specially) a domestic animal:--beast.
Thayer's Greek Lexicon:
 ͂ 
 
  ktēnos 
 
 1) a beast
 
 1a) especially a beast of burden
 1b) used for four legged animals as opposed to fishes and birds
 
  Part of Speech: noun neuter
Relation: from G2932
 
Usage:
This word is used 4 times:
Luke 10:34: "him on his own  beast, and brought him to an inn,"
Acts 23:24: "And provide  them beasts, that they may set Paul on, and bring him safe unto"
1 Corinthians 15:39: "of men, another flesh  of beasts, another of fishes,"
Revelation 18:13: "and wheat, and  beasts, and sheep, and horses,"