hot- - impa
- idle stand
- idler
- idler roller
- igneous concentration
- igneous metallurgy
- ignitable
- igniting
- ignition
- ignition furnace
- ignition hood
- ignition method
- ignition point
- ignition powder
- ignition temperature
- ignitron tube
- ihrigizing
- Illium
- illuminated by polarized light
- illuminated diagram
- illuminated indicator board
- illuminated magnifier
- illuminated obliquely
- illuminating lens
- illumination arrangement
- illumination by white light
- illuminator
- ilmenorutile
- ILZRO
- IM
- image
- image (converter) tube
- image (photoelectronic) intensifier
- image definition
- image formation
- image frequency
- image storage method
- image tenacity
- imaging
- imbed
- imbeddability