pileus

noun
pi·​le·​us | \ ˈpī-lē-əs How to pronounce pileus (audio) \
plural pilei\ ˈpī-​lē-​ˌī How to pronounce pileus (audio) \

Definition of pileus

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

Examples of pileus in a Sentence

Recent Examples on the Web By the 14th century, pileus caps were becoming taller and more cylindrical, similar to a modern chef’s hat but shorter. National Geographic, "Why do graduates wear those square hats?," 11 June 2020 This style, the pileus rotundus, was adopted mainly by university students studying law, medicine, and the sciences. National Geographic, "Why do graduates wear those square hats?," 11 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pileus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pileus

1663, in the meaning defined at sense 1

History and Etymology for pileus

New Latin, from Latin

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Cite this Entry

“Pileus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pileus. Accessed 7 Mar. 2021.

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More Definitions for pileus

pileus

noun
pi·​le·​us | \ ˈpī-lē-əs How to pronounce pileus (audio) \
plural pilei\ -​lē-​ˌī How to pronounce pileus (audio) \

Medical Definition of pileus

: 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

More from Merriam-Webster on pileus

Britannica.com: Encyclopedia article about pileus

Comments on pileus

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