metronymic /met-rə-nimˈik/ or matronymic /mat-/

1. Derived from the name of one's mother or other female ancestor
2. Indicating the mother
3. Using such a system of naming

A name so derived (cf patronymic)

• positivists
• positivities
• positivity
• positon
• positron
• positron emission tomography
• positron emission tomography scanner
• positron emission tomography scanners
• positronium
• positroniums
• positrons
• posits
• posnet
• posnets
• posological
• posologies
• posology
• poss
• posse
• posse comitatus
• possed
• posser
• possers
• posses
• possess