ULTRADIAN
Meaning of ULTRADIAN in English
/ul tray"dee euhn/ , adj.
of or pertaining to a biorhythm having a period of less than 24 hours.
[ 1960-65; ULTRA- + L di ( es ) day + -AN ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012