acrania

1 of 2

noun

acra·​nia (ˈ)ā-ˈkrā-nē-ə How to pronounce acrania (audio)
: congenital partial or total absence of the skull

Acrania

2 of 2

noun plural

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

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Cite this Entry

“Acrania.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/acrania. Accessed 17 Apr. 2024.

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