- restimulators are those approximations in the environment of an individual of the content of an engram. (DTOT, p. 42)
- an approximation of the reactive mind's content or some part thereof continually perceived in the environment of the organism. (DTOT, p. 27)
- the individual with an engram receives something in his environment similar to the perceptions in the engram. (DMSMH, p. 73)
- words, voice tones, music, whatever they are—things which are filed in the reactive mind bank as parts of engrams. (DMSMH, p. 74)