Dictionary Thesaurus Word Dynamo Quotes Reference Translator Spanish

phototaxy

[foh-tuh-tak-sis]

noun Biology.

movement of an organism toward or away from a source of light.

Also, pho·to·tax·y.

Origin:
1900–05; photo- + -taxis

Related forms

pho·to·tac·tic

[foh-tuh-tak-tik] , adjective

pho·to·tac·ti·cal·ly, adverb

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source

Link To phototaxy

00:10

00:09

00:08

00:07

00:06

00:05

00:04

00:03

00:02

00:01

Phototaxy is always a great word to know.

So is gobo. Does it mean:

a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...

Collins

World English Dictionary

phototaxis or phototaxy (ˌfəʊtəʊˈtæksɪs)

—n
	the movement of an entire organism in response to light

phototaxy or phototaxy

—n

phototactic or phototaxy

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source

Word Dynamo By Dictionary.com

Searching for phototaxy? How many words do you actually know?

FIND OUT

Enjoy Dictionary.com ad-free! Learn more

Quote Of The Day

"If someday I make a dictionary of definitions wanting single words to head them, a cherished entry will be "To abridge, expand, or otherwise alter or cause to be altered for the sake of belated improvement, one's own writings in translation.""

-Vladimir Nabokov

Partners:Word Bloglines Citysearch The Daily Beast Ask Answers Ask Kids Life123 Sendori Thesaurus

About Privacy Policy Terms of Use API Careers Advertise with Us Contact Us Help

phototaxy

pho·to·tax·is