1. Relating to asterisms or constellations

See also: asterism

• protoarcheology
• protoavis
• protoceratops
• protocol
• protoctist
• protoctist family
• protoctist genus
• protoctist order
• Protoctista
• protogeometric
• protoheme
• protohemin
• protohippus
• protohistory
• protology
• protomammal
• protomartyr
• proton
• proton accelerator
• proton magnetic resonance
• protonotary
• protoplasm
• protoplasmic
• protoplasmic astrocyte
• protoplast