acrocranial

adjective

ac·​ro·​cra·​ni·​al

¦a-krō-¦krā-nē-əl

variants or acrocranic

¦a-krō-¦krā-nik

of a skull

: being pyramidal or pointed at the top with a breadth-height index of 98 or above

acrocrany

ˈa-krō-ˌkrā-nē

noun

plural -es

Word History

Etymology

acr- + cranial, cranic

First Known Use

1920, in the meaning defined above

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!