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

Medical Dictionary

nail

play
noun \ˈnā(ə)l\

Medical Definition of nail

  1. 1:  a horny sheath of thickened and condensed epithelial stratum lucidum that grows out from a vascular matrix of dermis and protects the upper surface of the end of each finger and toe of humans and most other primates and that is strictly homologous with the hoof or claw of other mammals from which it differs chiefly in shape and size—called also nail plate

  2. 2:  a structure (as a claw) that terminates a digit and corresponds to a nail

  3. 3:  a rod (as of metal) used to fix the parts of a broken bone in normal relation <a medullary nail>





Seen and Heard

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

WORD OF THE DAY

February 8, 2016

to clear from accusation or blame

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?

spindrift kittly-benders duvet pince-nez
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