- the fundamental tissue of plants, composed of thin-walled cells able to divide.
- the specific tissue of an animal organ as distinguished from its connective or supporting tissue.
- a type of soft, spongy connective tissue of certain invertebrates, as the flatworms.
- the functional tissue of a morbid growth.
- unspecialized plant tissue consisting of simple thin-walled cells with intervening air spaces: constitutes the greater part of fruits, stems, roots, etc
- animal tissue that constitutes the essential or specialized part of an organ as distinct from the blood vessels, connective tissue, etc, associated with it
- loosely-packed tissue filling the spaces between the organs in lower animals such as flatworms
