- incised
- in round numbers
- indivisible (as a number)
- impersonalist
- inband signalling
- intertwining
- interureteric
- in complete readiness
- insensitively
- indifferently
- inverse cotangent
- in his own right
- inner attack
- in the adjacent apartment
- indus
- incontestible
- incontinence
- incontinence of faeces
- incontinence of urine
- in full action
- inorganically
- international standard digitalis powder
- in transit authorisation
- ingressive
- in greater depth
- in the short term
- immaculate conception
- intuitionalism
- immaculately
- intuitionistic
- in urdu and persian
- intermetacarpal joint
- intermetatarsal joint
- isopod
- inebriation
- impressible
- in strength
- imaginary part
- ilmenite
- intussusceptum
- intumesscence
- inkwell
- ice_skater
- in action
- isopycnic gradient centrifugation
- incidents
- incilined tube evaporator
- i. e. something very shortlived
- incomputable
- immeasurable