Strong's #3389: metraloias (pronounced may-tral-o'-as)
 from 3384 and the base of 257; a mother-thresher, i.e. matricide:--murderer of mothers.
Thayer's Greek Lexicon:
 ́ͅ 
 
  mētralōas 
 
 1) matricide, the murderer of a mother
 
  Part of Speech: noun masculine
Relation: from G3384 and the base of G257
 
Usage:
This word is used 1 times:
1 Timothy 1:9: "profane, for murderers of fathers and  murderers of mothers, for manslayers,"