protopine

noun
pro·​to·​pine | \ ˈprōt-ə-ˌpēn How to pronounce protopine (audio) \

Medical Definition of protopine

: a crystalline alkaloid C20H19NO5 found in small quantities in opium and in many plants of the poppy family

Learn More about protopine

Cite this Entry

“Protopine.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/protopine. Accessed 19 Sep. 2020.

Comments on protopine

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

WORD OF THE DAY

Test Your Vocabulary

Homophone Quiz

  • three bears two of them look like theyre whispering to a third bear who looks chuffed to be the center of attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Add Diction

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

TAKE THE QUIZ
Love words? Need even more definitions?

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