Strong's #2175: euodia (pronounced yoo-o-dee'-ah)
 from a compound of 2095 and a derivative of 3605; good-scentedness, i.e. fragrance:--sweet savour (smell, -smelling).
Thayer's Greek Lexicon:
 ̓́ 
 
  euōdia 
 
 1) a sweet smell, fragrance
 2) a fragrant or sweet smelling thing, incense, on odour or something sweet smelling
 
 2a) an odour of acquiescence, satisfaction
 2b) a sweet odour, spoken of the smell of sacrifices and obligations, agreeably to the ancient notion that God smells and is pleased with the odour of sacrifices
 
 3) metaphorically a thing well pleasing to God
 
  Part of Speech: noun feminine
Relation: from a compound of G2095 and a derivative of G3605
  Citing in TDNT: 2:808, 285
 
Usage:
This word is used 3 times:
2 Corinthians 2:15: "For we are unto God  a sweet savor of Christ, in them that are saved, and"
Ephesians 5:2: "a sacrifice to God for  a sweetsmelling savor."
Philippians 4:18: "which were sent from you, an odor  of a sweet smell, a sacrifice acceptable, well-pleasing to God."