vitals Meaning, Definition & Usage

  1. noun a bodily organ that is essential for life
    vital organ.

WordNet

Vi"tals noun plural
Definitions
  1. Organs that are necessary for life; more especially, the heart, lungs, and brain.
  2. Fig.: The part essential to the life or health of anything; as, the vitals of a state. "The vitals of the public body." Glanvill.

Webster 1913