killing one's mother, matricidal
Ancient Greek word, found 14 times in the texts on Socratos.
Euripides, The Trojan Women 363: μητροκτόνους τʼ ἀγῶνας, οὓς οὑμοὶ γάμοι
Euripides, Electra 975: μητροκτόνος νῦν φεύξομαι, τόθʼ ἁγνὸς ὤν.
Euripides, Orestes 1559: ἤγγειλέ μοί τις. ἀλλὰ τοῦ μητροκτόνου