Pronunciation: (nek'sus), [key]
1. a means of connection; tie; link.
2. a connected series or group.
3. the core or center, as of a matter or situation.
4. Cell Biol.a specialized area of the cell membrane involved in intercellular communication and adhesion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.