1. A metric unit of length equal to one billionth of a meter
   - nanometer [US], nanometre [Brit, Cdn], nm, micromillimeter [US], micromillimetre [Brit, Cdn]

Derived forms: millimicrons

Type of: metric linear unit

Part of: micrometer [US], micrometre [Brit, Cdn], micron

Encyclopedia: Millimicron

• invulnerable
• inward
• inward-developing
• inward-moving
• inwardly
• inwardness
• inwards
• inweave
• inwrought
• Io
• io moth
• IOC
• iodate
• iodic acid
• iodide
• iodin
• iodinate
• iodinated
• iodinated protein
• iodinating
• iodination
• iodine
• iodine-125
• iodine-131
• iodise