Encephalous

/ɛnˈsɛfələs/ adjective

Definition

Having a brain or brain-like structure; possessing a distinct head region.

Etymology

From Greek en- (within) + kephalos (head), plus the adjective suffix -ous. This biological term describes organisms or creatures that have a defined brain and head structure.

Kelly Says

Biologists use this word to separate 'encephalous' animals (like us, with actual brains) from creatures like jellyfish that have nerve nets instead—it's a simple way to mark a huge leap in evolution where animals stopped being blobs and developed brains.

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