infradian

[ ĭn-frādē-ən, ĭn′frə-dēən ]

adj.

Relating to biological variations or rhythms occurring in cycles less frequent than every 24 hours.

QUIZZES

Discover The Influence Of Portuguese On English Via This Quiz!
We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
Question 1 of 11
Which of the following animal names traces its immediate origin to Portuguese?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.