1. Having only one axis; developing along a single line or plane 
2. Having but one optic axis, or line of no double refraction

Encyclopedia: Uniaxial

• Polaroid camera
• Polaroid Land camera
• polder
• pole
• pole bean
• pole horse
• pole jump
• pole jumper
• pole jumping
• pole position
• pole vault
• pole vaulter
• pole vaulting
• pole-handled
• poleax
• poleaxe
• polecat
• polecat weed
• polemic
• polemical
• polemically
• polemicise
• polemicist
• polemicize
• polemics