coma

noun

1. deep, prolonged unconsciousness caused by injury or disease
2. a condition of stupor or lethargy

noun pl. comae

1. Astron. a comet's gaseous cloud surrounding the solid nucleus and forming, with the nucleus, the comet's head
2. 1. a bunch of branches, as on the top of some palm trees
   2. a terminal cluster of bracts on a flowering stem, as in pineapples
   3. a tuft of hairs at the end of certain seeds
3. Photog. a blur caused by the spherical aberration of oblique rays of light passing through a lens