1560s, "act of vegetating," from Middle French végétation, from Medieval Latin vegetationem (nominative vegetatio) "a quickening, action of growing," from vegetare "grow, quicken" (see vegetable). Meaning "plant life" first recorded 1727.
vegetation veg·e·ta·tion (věj'ĭ-tā'shən)
The process of growth in plants.
An abnormal bodily growth or excrescence, especially a clot composed largely of fused blood platelets, fibrin, and sometimes bacteria that is adherent to a diseased heart valve.
A vegetative state of impaired consciousness.