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

protoplasm

play
noun pro·to·plasm \ˈprō-tə-ˌpla-zəm\

Simple Definition of protoplasm

  • biology : the usually colorless substance that is the living part of animal and plant cells

Full Definition of protoplasm

  1. 1 :  the organized colloidal complex of organic and inorganic substances (as proteins and water) that constitutes the living nucleus, cytoplasm, plastids, and mitochondria of the cell

  2. 2 :  cytoplasm

pro·to·plas·mic play \ˌprō-tə-ˈplaz-mik\ adjective

Origin of protoplasm

German Protoplasma, from prot- + New Latin plasma


First Known Use: 1848


PROTOPLASM Defined for Kids

protoplasm

play
noun pro·to·plasm \ˈprō-tə-ˌpla-zəm\

Definition of protoplasm

  1. :  the usually colorless and jellylike living part of cells




Medical Dictionary

protoplasm

play
noun pro·to·plasm \ˈprōt-ə-ˌplaz-əm\

Medical Definition of protoplasm

  1. 1:  the organized colloidal complex of organic and inorganic substances (as proteins and water) that constitutes the living nucleus, cytoplasm, plastids, and mitochondria of the cell and is regarded as the only form of matter in which the vital phenomena (as metabolism and reproduction) are manifested

  2. 2:  cytoplasm




Learn More about protoplasm


Seen and Heard

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

WORD OF THE DAY

February 9, 2016

marked by high spirits and laughter

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

duvet pince-nez kittly-benders spindrift
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