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

photosynthesis

play
noun pho·to·syn·the·sis \-ˈsin(t)-thə-səs\

Simple Definition of photosynthesis

  • biology : the process by which a green plant turns water and carbon dioxide into food when the plant is exposed to light

Full Definition of photosynthesis

  1. :  synthesis of chemical compounds with the aid of radiant energy and especially light; especially :  formation of carbohydrates from carbon dioxide and a source of hydrogen (as water) in the chlorophyll-containing cells (as of green plants) exposed to light

pho·to·syn·the·size play \-ˌsīz\ intransitive verb
pho·to·syn·thet·ic play \-sin-ˈthe-tik\ adjective
pho·to·syn·thet·i·cal·ly play \-ti-k(ə-)lē\ adverb

Origin of photosynthesis

New Latin


First Known Use: 1898


PHOTOSYNTHESIS Defined for Kids

photosynthesis

play
noun pho·to·syn·the·sis \ˌfō-tə-ˈsin-thə-səs\

Definition of photosynthesis

  1. :  the process by which green plants and a few other organisms (as some protists) form carbohydrates from carbon dioxide and water in the presence of light

pho·to·syn·thet·ic \-sin-ˈthe-tik\ adjective <photosynthetic activity>



Medical Dictionary

photosynthesis

play
noun pho·to·syn·the·sis \ˌfōt-ō-ˈsin(t)-thə-səs\

Medical Definition of photosynthesis

plural pho·to·syn·the·ses

  1. :  synthesis of chemical compounds with the aid of light sometimes including the near infrared or near ultraviolet; especially :  the formation of carbohydrates from carbon dioxide and a source of hydrogen (as water) in chlorophyll-containing cells (as of green plants) exposed to light involving a photochemical release of oxygen through the decomposition of water followed by various enzymatic synthetic reactions that usually do not require the presence of light

  2. pho·to·syn·the·size \-ˌsīz\play also British pho·to·syn·the·sise intransitive verb, pho·to·syn·the·sized also British pho·to·syn·the·sised pho·to·syn·the·siz·ing also British pho·to·syn·the·sis·ing
    pho·to·syn·thet·ic \-sin-ˈthet-ik\play adjective
    pho·to·syn·thet·i·cal·ly \-i-k(ə-)lē\play adverb





Seen and Heard

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

WORD OF THE DAY

February 12, 2016

of, relating to, or suggestive of marble

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

2.2 pounds 16.96 pounds 196.5 pounds 100 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ