Strong's G3389 — μητραλῴας (noun)
metraloas (may-tral-ow"'-as) n.
1. a matricide, mother murderer
2. (literally) mother-thresher
[from G3384 and the base of G257]
KJV: murderer of mothers 
Root(s): G3384, G257 
Compare: G3964 
Hebrew root: ἅλων
Occurrences: 1