Nearby Words

photoperiod

[foh-tuh-peer-ee-uhd]

pho·to·pe·ri·od

[foh-tuh-peer-ee-uhd]
noun Biology.
the interval in a 24-hour period during which a plant or animal is exposed to light.

Origin:
1915–20; photo- + period

pho·to·pe·ri·od·ic [foh-tuh-peer-ee-od-ik] , pho·to·pe·ri·od·i·cal, adjective
pho·to·pe·ri·od·i·cal·ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To photoperiod

:10

:09

:08

:07

:06

:05

:04

:03

:02

:01

Photoperiod is always a great word to know.
So is segmentation. Does it mean:
profound change in form from one stage to the next in the life of an organism, as from the caterpillar to the pupa and then to the adult butterfly
the subdivision of an organism or of an organ into more or less equivalent parts; cell division
Collins
World English Dictionary
photoperiod (ˌfəʊtəʊˈpɪərɪəd)
 
n
See also photoperiodism the period of daylight in every 24 hours, esp in relation to its effects on plants and animals
 
photoperi'odic
 
adj
 
photoperi'odically
 
adv

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

photoperiod pho·to·pe·ri·od (fō'tō-pĭr'ē-əd)
n.
The duration of an organism's daily exposure to light, considered especially with regard to the effect of such exposure on growth and development.


pho'to·pe'ri·od'ic (-ŏd'ĭk) or pho'to·pe'ri·od'i·cal (-ĭ-kəl) 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
photoperiod   (fō'tō-pîr'ē-əd)  Pronunciation Key 
The duration of an organism's daily exposure to light, considered especially with regard to the phenomena of photoperiodism.
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