cytoskeleton

from WordNet (r) 3.0 (2006)

cytoskeleton
    n 1: a microscopic network of actin filaments and microtubules
         in the cytoplasm of many living cells that gives the cell
         shape and coherence

from The Collaborative International Dictionary of English v.0.48

cytoskeleton \cy`to*skel"e*ton\
   (s[imac]`t[-o]*sk[e^]l"[i^]*t'n), n. (Cell Biology)
   An arrangement of microtubules, microfilaments, and larger
   filaments within a cell serving to provide structural support
   of components of the cell, and to transport components from
   one part of the cell to another; the filaments are composed
   of protein and form a latticelike arrangement which may
   change rapidly with time.
   [PJC]