the GNU version of the Collaborative International Dictionary of English
adj. Within a cell. Contrasted with extracellular.
The Century Dictionary and Cyclopedia
Existing or done inside of a cell: opposed to extracellular: as, intracellular circulation or digestion; intracellular formation of spores in certain fungi. Most of the vital activities or functions of the Protozoa are intracellular.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. located or occurring within a cell or cells
Word Usage
"Action potentials almost always generate large increases in intracellular calcium to exert any biological effect such as the release of neurotransmitters to excite or inhibit the next neuron in the pathway."