matricide /māˈtri- or matˈri-sīd/

1. A murderer of his or her own mother
2. The murder of one's own mother

matricīˈdal adjective

• opaquer
• opaques
• opaquest
• opaquing
• op art
• op cit
• opcode
• opcodes
• OPCW
• ope
• OPEC
• op-ed
• opeidoscope
• opeidoscopes
• open
• openable
• open access
• open-access
• open adoption
• open aestivation
• open-air
• open-and-shut
• open a person's eyes
• open-armed
• open book