Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

heliotropism

play
noun he·li·ot·ro·pism \ˌhē-lē-ˈä-trə-ˌpi-zəm\

Definition of heliotropism

  1. :  phototropism in which sunlight is the orienting stimulus

heliotropic

play \-lē-ə-ˈtrō-pik, -ˈträ-\ adjective


Circa 1854

First Known Use of heliotropism

circa 1854


Medical Dictionary

heliotropism

play
noun he·li·ot·ro·pism \ˌhē-lē-ˈä-trə-ˌpiz-əm\

Medical Definition of heliotropism

  1. :  phototropism in which sunlight is the orienting stimulus

heliotropic

\-lē-ə-ˈtrōp-ik, -ˈträp-\play play adjective



Seen and Heard

What made you want to look up heliotropism? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to proceed clumsily or ineffectually

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

torrent megillah interruption rebellion
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ