pro·​to·​plast | \ ˈprō-tə-ˌplast How to pronounce protoplast (audio) \

Definition of protoplast

1 : one that is formed first : prototype
2 : a plant cell that has had its cell wall removed also : the nucleus, cytoplasm, and plasma membrane of a cell as distinguished from inert walls and inclusions

Examples of protoplast in a Sentence

Recent Examples on the Web

Moisturize with Shiseido Waso Clear Mega-Hydrating Cream, made with whole carrot protoplasts (what's left of the cell when its wall dissolves). Maya Mcdowell, Seventeen, "These Superfood-Inspired Beauty Products Are a *Must* for Your Most Annoying Skin Issues," 21 May 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'protoplast.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of protoplast

1532, in the meaning defined at sense 1

History and Etymology for protoplast

Middle French protoplaste, from Late Latin protoplastus first human, from Greek prōtoplastos first formed, from prōt- prot- + plastos formed, from plassein to mold — more at plaster

Keep scrolling for more

Learn More about protoplast

Statistics for protoplast

Look-up Popularity

Time Traveler for protoplast

The first known use of protoplast was in 1532

See more words from the same year

Keep scrolling for more

More Definitions for protoplast


pro·​to·​plast | \ ˈprōt-ə-ˌplast How to pronounce protoplast (audio) \

Medical Definition of protoplast

: the nucleus, cytoplasm, and plasma membrane of a cell as distinguished from inert walls and inclusions

More from Merriam-Webster on protoplast Encyclopedia article about protoplast

Comments on protoplast

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


involving a confidence or trust

Get Word of the Day daily email!

Test Your Vocabulary

Word Puzzles

  • alt 57589b2b4c6a3
  • Which answer pairs best with each of the following words? living, estate, club, music, road, mile
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!