- idiographic
- if men were like atoms we could not detect them
- illness is like falling into the doldrums
- cells have preferences and make decisions
- immune cells may have unhealthy interests
- immune cells try to kill pathogens
- impact factor
- impetus is given to the projectile just as heat is given to water by a fire
- implicit knowledge
- implicit learning
- In Our Time
- incremental generalisation
- independent variable
- infection is more revolution than invasion
- inference uses forceps
- information technology is the twist in the Möbius strip
- inherent property
- insidious alternative conception
- intellectually honest
- inter-rater reliability
- interferons languished in a sort of scientific Siberia
- internal consistency
- interplanetary dust particles are like the seeds of the Solar System
- interpretive research
- interpretive resources
- interventional research
- intervention study
- intervention studies
- interview
- intuition
- invasive species are incredible hitchhikers
- investigating objects in space is like measuring the timbers of a ship
- islands are bathed by the oceans
- islands are populated by flotsam and jetsam