acrania

noun
acra·​nia | \ (ˈ)ā-ˈkrā-nē-ə \

Medical Definition of acrania 

(Entry 1 of 2)

: congenital partial or total absence of the skull

Acrania

noun plural

Medical Definition of Acrania (Entry 2 of 2)

in some classifications
: a division of the phylum or subkingdom Chordata comprising the hemichordates, tunicates, and lancelets and including all the chordates without true heads and anterior brains — compare vertebrata

Learn More about acrania

Comments on acrania

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

WORD OF THE DAY

involving abstract or general statements

Get Word of the Day daily email!

Test Your Vocabulary

Liar, Liar Quiz

  • alt-5761dbe2ba986
  • Someone who pretends to be sick in order to avoid work is a:
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Add Diction

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!