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

norethindrone

play
noun nor·eth·in·drone \ˌnȯr-ˈe-thən-ˌdrōn\

Definition of norethindrone

  1. :  a synthetic progestational hormone C20H26O2 used in birth control pills often in the form of its acetate



Origin of norethindrone

nor- + ethinyl + hydr- + -one (as in progesterone)


First Known Use: 1958


Medical Dictionary

norethindrone

play
noun nor·eth·in·drone \nȯr-ˈeth-ən-ˌdrōn, ˌnȯr-eth-ˈin-\

Medical Definition of norethindrone

  1. :  a synthetic progestational hormone C20H26O2 used in birth control pills often in the form of its acetate C22H28O3—see loestrin, minastrin, ortho-novum




Learn More about norethindrone


Seen and Heard

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

WORD OF THE DAY

tending to dismiss important matters

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

disapprove perplex soothe reduce
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ