Related Searches
Nearby Words
Synonyms
Synonym Game
sleep
PLAY

comas

 [koh-muh]  

co·ma

1   [koh-muh]
noun, plural co·mas.
a state of prolonged unconsciousness, including a lack of response to stimuli, from which it is impossible to rouse a person.
Origin:
1640–50; < Greek kôma deep sleep

00:10

00:09

00:08

00:07

00:06

00:05

00:04

00:03

00:02

00:01

Comas is always a great word to know.
So is flibbertigibbet. Does it mean:
a scrap or morsel of food left at a meal.
a chattering or flighty, light-headed person.
LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...
Dictionary.com Unabridged

co·ma

2   [koh-muh]
noun, plural co·mae  [-mee] .
1.
Astronomy. the nebulous envelope around the nucleus of a comet.
2.
Optics. a monochromatic aberration of a lens or other optical system in which the image from a point source cannot be brought into focus, the image of a point having the shape of a comet.
3.
Botany.
a.
a tuft of silky hairs at the end of a seed.
b.
the leafy crown of a tree; cluster of leaves at the end of a stem.
c.
a terminal cluster of bracts, as in the pineapple.
Origin:
1660–70; < Latin: hair < Greek kómē
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To comas
American Heritage
Science Dictionary
coma 1   (kō'mə)  Pronunciation Key 
Plural comas
A state of deep unconsciousness, usually resulting from brain trauma or metabolic disease, in which an individual is incapable of sensing or responding to external stimuli.
coma 2   (kō'mə)  Pronunciation Key 
Plural comae (kō'mē)

  1. Astronomy The brightly shining cloud of gas that encircles the nucleus and makes up the major portion of the head of a comet near the Sun. As a comet moves along its orbit away from the Sun, the gas and dust of the coma dissipate, leaving only the nucleus. A coma can have a diameter of up to 100,000 km (62,000 mi.). See more at comet.

  2. Physics A diffuse, comet-shaped image of a point source of light or radiation caused by aberration in a lens or mirror. The image appears progressively elongated with distance from the center of the field of view.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Partners:WordBloglinesCitysearchThe Daily BeastAsk AnswersAsk KidsLife123SendoriThesaurus
Dictionary.com, LLC. Copyright © 2012. All rights reserved.
About Privacy Policy Terms of Use API Careers Advertise with Us Contact Us Help
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT