- isenergetic flow
- isenthalpic expansion
- isenthalpic line
- isenthalpic process
- isentrope
- isentropic
- isentropic change
- isentropic compressibility
- isentropic compression
- isentropic expansion
- isentropic exponent
- isentropic flow
- isentropic line
- isentropic process
- isentropic refrigeration
- isethonic
- ishmael
- ishmaelite
- isichore
- isinglass
- isinglass industry
- isinglass stone
- islam
- islamic
- islamic architecture
- islamisation
- islamise
- islamism
- islamite
- islamization
- islamize
- island
- island arc
- island ban
- island basin
- island bath
- island breakwater
- island chain
- island depot
- island display
- island embankment
- island graft
- island hill
- island position
- island sink
- island site
- island station
- islander
- islandish
- isle
- islet
- ism
- iso curve
- iso-center
- iso-curves
- iso-energetic
- iso-iconia
- isoagglutination
- isoagglutinative
- isoagglutinin
- isoagglutinogen
- isoamplitude
- isoantibody
- isoantigen
- isoatmix
- isoazimuth
- isobar
- isobar line
- isobaric
- isobaric line
- isobaric process
- isobaric spin
- isobarometric filler
- isobars
- isobase
- isobath
- isobathic
- isobathic line
- isobaths
- isobits bit
- isobolism
- isobutane
- isobutene
- isobutylene
- isocandle
- isocellular
- isocentre
- isochion
- isochor
- isochore
- isochoric
- isochromate
- isochromated line
- isochromatic
- isochromatic fringe
- isochromatic line
- isochrome
- isochromosome
- isochronal
- isochronal annealing