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

pileus

play
noun pi·le·us \ˈpī-lē-əs\

Definition of pileus

plural pi·lei play \-lē-ˌī\

  1. 1 [Latin] :  a pointed or close-fitting cap worn by ancient Romans

  2. 2 :  the convex, concave, or flattened spore-bearing structure of some basidiomycetes that is attached superiorly to the stem and typically is expanded with gills or pores on the underside —called also cap



Origin of pileus

New Latin, from Latin


First Known Use: 1715


Medical Dictionary

pileus

play
noun pi·le·us \ˈpī-lē-əs\

Medical Definition of pileus

plural pi·lei \-lē-ˌī\play

  1. :  the convex, concave, or flattened spore-bearing structure of some basidiomycetous fungi that is attached to the top of the stem and typically is expanded with gills or pores on the underside—called also cap




Learn More about pileus

  1. Medical Dictionary: Definition of "pileus" Britannica.com: Encyclopedia article about "pileus"


Seen and Heard

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

WORD OF THE DAY

February 6, 2016

an official order, decree, or edict

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?

pince-nez kittly-benders duvet spindrift
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