INTERACTIVE

synergistic, interactive

(adjective) used especially of drugs or muscles that work together so the total effect is greater than the sum of the two (or more)

interactional, interactive

(adjective) capable of acting on or influencing each other

Source: WordNet® 3.1

Etymology

Adjective

interactive (comparative more interactive, superlative most interactive)

Interacting with or communicating with and reacting to each other; influencing or having an effect on each other; acting or capable of acting on each other or with the other.

(computer science) Responding to the user.

Noun

interactive (plural interactives)

A feature (as in a museum) that can be interacted with.

Source: Wiktionary