(kō′mə) noun plural co·mas
1. A state of unconsciousness with slow, heavy breathing: sometimes called by the names of the conditions or diseases that cause them: diabetic coma (occurring in diabetes), uremic coma (from excess of urea), etc.
2. Stupor; lethargy. [<NL <Gk. kōma deep sleep]

(kō′mə) noun plural co·mae (kō′mē)
1. Astron. The nebulosity around the nucleus of a comet.
2. Bot. A tuft of silky hairs, as at the end of certain seeds.
3. Optics The hazy border surrounding an object viewed through an imperfect lens. [<L, hair <Gk. komē]
—co′mal adjective