- internal oxidation
- internal plasticizer
- internal reflux
- internal ring
- internal screw
- internal structure
- internalaction
- international convention
- international customs
- interpenetrating
- interpenetration
- interposed
- interrupter
- intersertal
- intersertal texture
- intra-cellular
- intraformation breccia
- intratelluric
- intrinsic conduction
- intrusive breccia
- intrusive dome
- inulin
- inundation
- invent
- inverted
- inverted pendulum
- inverted rilief
- invisible loss
- interstial material
- interstidal
- interstratification
- interstratified tuff
- intramagmatic
- intricacy
- intruded
- intrusion
- intrusive body
- intumescence
- intumescent paint
- invar
- inverted order
- investment permit
- involatile
- involve
- involved rock
- iodine
- iodine number
- iodine value
- iodize
- iodometric
- iodous
- ion exchange
- ion fractionation
- ion retardation
- ion-exchanger
- ionic
- ionic membrane
- ionic potential
- ionic product
- ionic reaction
- ionite
- ionization
- ionized layer
- ionizing layer
- ionosphere
- ipe
- iridic
- irish moss
- iron age
- iron black
- iron carbonate
- iron cell
- iron content
- iron pig
- iron red
- iron slag
- iron spinel
- iron sponge
- iron-nickel
- inwall
- iodargyrite
- iodobenzene
- iodometry
- ion activity
- ion conduction
- ionexchange process
- ionic bond
- ionic polymerization
- ionization sheet
- ionized atom
- irised
- iroko
- iron
- iron carbonyl
- iron clay
- iron meteorite
- iron oxide
- iron pyrite
- iron scale
- iron soap