Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Relating to or exhibiting periodic physiological activity that occurs more than once every 24 hours.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Cyclical with a periodicity significantly shorter than 24 hours, that is, more frequent than
circadian .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
Support
Help support Wordnik (and make this page ad-free) by adopting the word ultradian.
Examples
-
In fact, I, along with my twenty-four year old son, experience what is known as ultradian rapid-cycling.
Brain Blogger 2009
-
In fact, I, along with my twenty-four year old son, experience what is known as ultradian rapid-cycling.
Brain Blogger 2009
-
In fact, I, along with my twenty-four year old son, experience what is known as ultradian rapid-cycling.
Brain Blogger 2009
-
In fact, I, along with my twenty-four year old son, experience what is known as ultradian rapid-cycling.
Brain Blogger 2009
-
In fact, I, along with my twenty-four year old son, experience what is known as ultradian rapid-cycling.
Brain Blogger 2009
-
For longer naps, test multiples of 90 minutes, which is called an "ultradian" rhythm in some papers, though the proper term should be "infradian" since it's less than 24 hours.
Tim Ferriss: Relax Like a Pro: 5 Steps to Hacking Your Sleep 2008
-
This "ultradian rhythm," the researcher Peretz Lavie and others have found, governs our energy levels.
Tony Schwartz: A 90-Minute Plan for Personal Effectiveness Tony Schwartz 2011
-
I'm ultra-rapid-cycling (ultradian) bipolar I with comorbid post-traumatic stress.
I hate you. Where's my snowpocalypse? kylecassidy 2010
-
Other researchers have called this our "ultradian rhythm."
-
During the subsequent half hour, his subjects were significantly more likely to fall asleep than at other times, clear evidence of the ultradian rhythm and the cyclical nature of our alertness and fatigue throughout the day.
Be Excellent at Anything Tony Schwartz 2010
Comments
Log in or sign up to get involved in the conversation. It's quick and easy.