Nearby Words

phototropism

[foh-to-truh-piz-uhm, foh-toh-troh-piz-uhm]

pho·tot·ro·pism

[foh-to-truh-piz-uhm, foh-toh-troh-piz-uhm]
noun Botany.
phototropic tendency or growth.

Origin:
1895–1900; photo- + -tropism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To phototropism

:10

:09

:08

:07

:06

:05

:04

:03

:02

:01

Phototropism is always a great word to know.
So is antheridia. Does it mean:
male reproductive structure which produces gametes in ferns, mosses, fungi and algae
female reproductive organ which produces eggs in bryophytes, ferns and most gymnosperms
Collins
World English Dictionary
phototropism (ˌfəʊtəʊˈtrəʊpɪzəm)
 
n
1.  the growth response of plant parts to the stimulus of light, producing a bending towards the light source
2.  the response of animals to light; phototaxis
 
photo'tropic
 
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
American Heritage
Medical Dictionary

phototropism pho·tot·ro·pism (fō-tŏt'rə-pĭz'əm)
n.
Growth or movement of a sessile organism toward or away from a source of light.


pho'to·tro'pic (fō'tə-trō'pĭk, -trŏp'ĭk) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
phototropism   (fō-tŏt'rə-pĭz'əm)  Pronunciation Key 
The growth or movement of a fixed organism toward or away from light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from the illuminated side to the darker side of the shoot, resulting in quicker growth on the darker side and bending of the shoot toward the source of light. Certain sessile invertebrates also exhibit phototropism.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Dictionary.com, LLC. Copyright © 2012. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature