1. A microscopic particle smaller than 100nm

Encyclopedia: Nanoparticle

• obtainment
• obtention
• obtrude
• obtrude upon
• obtruder
• obtrusion
• obtrusive
• obtrusively
• obtrusiveness
• obtund
• obturate
• obturation
• obturator
• obturator vein
• obtuse
• obtuse angle
• obtuse leaf
• obtuse triangle
• obtuse-angled triangle
• obtusely
• obtuseness
• obverse
• obvert
• obviate
• obviating