"These are all examples of groups of memes that are replicated together. Dawkins calls such groups ‘coadapted meme complexes’, a phrase recently abbreviated to ‘memeplexes’ (Speel 1995). Memetic jargon is changing so fast and much of it is so poorly thought out and so misused that I shall try to avoid using it. However, ‘memeplex’ is a handy word for an important concept and so it is one of the few new words I shall adopt." -- page 35
From trying to read about this years ago, I always remember the "Ent" and the "Enfilade" being Ted Nelson's abstractions for supporting bi-directional linking