matricide (n.)

1590s, "act of killing one's mother;" 1630s, "one who kills his mother;" from French matricide, from Latin mātricida "mother-killer," and mātricidium "mother-killing," from combining form of māter "mother" (see mother (n.1)) + -cida "killer," and -cidium "a killing," from caedere "to slay" (from PIE root *kae-id- "to strike"). Related: Matricidal (adj.). Old English had moðorslaga "a matricide, a mother-slayer."