perforated space

noun

variants or less commonly perforate space

: any of three small areas on the lower surface of the brain that are perforated by many small openings for blood vessels and that are situated two anteriorly at the commencement of the fissure of Sylvius and one posteriorly between the mammillary bodies in front and the cerebral peduncles laterally

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