The Collaborative International Dictionary of English v.0.48:
extracellular \extracellular\ adj. located or occurring outside of a living cell or cells; as, extracellular fluid. Opposite of intracellular. [WordNet 1.5]WordNet (r) 3.0 (2006):
extracellular adj 1: located or occurring outside a cell or cells; "extracellular fluid" [ant: intracellular]