Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

nyctitropism

noun
nyc·tit·ro·pism | \nikˈti‧trəˌpizəm\
plural -s

Definition of nyctitropism 

: a sleep movement in plants characterized by response to a stimulus that is greatest or exclusively from one direction — compare nyctinasty

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for nyctitropism

International Scientific Vocabulary nyct- + -tropism

Keep scrolling for more

Learn More about nyctitropism

Share nyctitropism

Resources for nyctitropism

Cite Time Traveler Time Traveler! Explore the year a word first appeared

Dictionary Entries near nyctitropism

nyctipelagic

Nyctipithecus

nyctitropic

nyctitropism

nycto-

nyctophobia

NYD

Statistics for nyctitropism

Look-up Popularity

Comments on nyctitropism

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

Show Comments  Hide Comments 

WORD OF THE DAY

nary

not any or not one

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Bee Cubed

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games