Strong's #5591: psuchikos (pronounced psoo-khee-kos')
 from 5590; sensitive, i.e. animate (in distinction on the one hand from 4152, which is the higher or renovated nature; and on the other from 5446, which is the lower or bestial nature):--natural, sensual.
Thayer's Greek Lexicon:
 ́ 
 
  psuchikos 
 
 1) of or belonging to breath
 
 1a) having the nature and characteristics of the breath
 
 1a1) the principal of animal life, which men have in common with the brutes
 
 1b) governed by breath
 
 1b1) the sensuous nature with its subjection to appetite and passion
 
  Part of Speech: adjective
Relation: from G5590
  Citing in TDNT: 9:661, 1342
 
Usage:
This word is used 6 times:
1 Corinthians 2:14: "But  the natural man receiveth not the things of the Spirit"
1 Corinthians 15:44: "It is sown  a natural body; it is raised a spiritual body. There is a natural"
1 Corinthians 15:44: "a spiritual body. There is  a natural body, and there is a spiritual"
1 Corinthians 15:46: "first which is spiritual, but  that which is natural; and afterward that which is spiritual."
James 3:15: "from above, but is earthly,  sensual, devilish."
Jude 1:19: "be they who separate themselves,  sensual, having not the Spirit."