Definition of heliotropism
: phototropism in which sunlight is the orienting stimulus
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
February 2021 Words of the Day Quiz
-
- Which is a synonym of perdure?

Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
Spell words. Make bears.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share heliotropism
Time Traveler for heliotropism
The first known use of heliotropism was circa 1854
See more words from the same year