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

tapetum

play
noun ta·pe·tum \tə-ˈpē-təm\

Definition of tapetum

plural ta·pe·ta play \-ˈpē-tə\

  1. 1 :  any of various reflective membranous layers or areas especially of the choroid and retina of the eye

  2. 2 :  a layer of nutritive cells that invests the sporogenous tissue in the sporangium of vascular plants



Origin of tapetum

New Latin, from Latin tapete carpet, tapestry, from Greek tapēt-, tapēs carpet


First Known Use: 1713


Medical Dictionary

tapetum

play
noun ta·pe·tum \tə-ˈpēt-əm\

Medical Definition of tapetum

plural ta·pe·ta \-ˈpēt-ə\play

  1. 1:  any of various membranous layers or areas especially of the choroid and retina of the eye; specifically :  tapetum lucidum

  2. 2:  a layer of nerve fibers derived from the corpus callosum and forming part of the roof of each lateral ventricle of the brain




Learn More about tapetum


Seen and Heard

What made you want to look up tapetum? 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?

196.5 pounds 100 pounds 2.2 pounds 16.96 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