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

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now