1. Noting the system of crystallization which has three unequal axes at right angles to each other

Encyclopedia: Orthorhombic

• Portunidae
• Portunus
• Portunus puber
• portwatcher
• Porzana
• Porzana porzana
• POS
• pos tagger
• posada
• pose
• posed
• Poseidon
• poser
• poseur
• poseuse
• posey
• posh
• posing
• posit
• position
• position effect
• position paper
• positionable
• positional
• positional notation