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

hydrocephalus

play
noun hy·dro·ceph·a·lus \-ˈse-fə-ləs\

Definition of hydrocephalus

  1. :  an abnormal increase in the amount of cerebrospinal fluid within the cranial cavity that is accompanied by expansion of the cerebral ventricles and often increased intracranial pressure, skull enlargement, and cognitive decline



Variants of hydrocephalus

also hydrocephaly play \-lē\

Origin of hydrocephalus

New Latin hydrocephalus, from Late Latin, hydrocephalic, adjective, from Greek hydrokephalos, from hydr- + kephalē head — more at cephalic


First Known Use: 1670


Medical Dictionary

hydrocephalus

play play
noun hy·dro·ceph·a·lus \-ˈsef-ə-ləs, British also -ˈkef-\

Medical Definition of hydrocephalus

plural hydrocephali \-ˌlī\play

  1. :  an abnormal increase in the amount of cerebrospinal fluid within the cranial cavity (as from obstructed flow, excess production, or defective absorption) that is accompanied by expansion of the cerebral ventricles and often increased intracranial pressure, skull enlargement, and cognitive decline



Illustration of hydrocephalus


Learn More about hydrocephalus


Seen and Heard

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

WORD OF THE DAY

to eat gluttonously or ravenously

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

oily prompt angry maudlin
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