cach·in·nate (k
k
-n
t
)
intr.v. cach·in·nat·ed, cach·in·nat·ing, cach·in·nates
To laugh hard, loudly, or convulsively; guffaw.
[Latin cachinnre, cachinnt-, of imitative origin.]
cachin·nation n.
cachin·nator n.
The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2003. Published by Houghton Mifflin Company. All rights reserved.
