organ

Definition

noun, plural: organs

A group of tissues that perform a specific function or group of functions.

Supplement

Examples of animal organs are heart, lungs, brain, eye, stomach, spleen, bones, pancreas, kidneys, liver,intestines, skin, urinary bladder and sex organs.

Examples of plant organs are the roots, stems, leaves, flowers, seeds and fruits.

Word origin: L. Organum, Gr.; akin to work, and E. Work: cf. F. Organe.