Crevice, fissure
CREVASSE!
crevasse
I assume you mean hilus, which is when a fissure in the internal organs of the person.
"In anatomy, a fissure is a deep groove in any of various parts of the body." "The scientists were studying a deep fissure in the ocean floor." "Steam was erupting from a new fissure in the area of the geysers."
A "fissure" is a crack or break in something. You might use the word "fissure' to describe a steep-sided canyon, something that looks like a crack in the mountain. You would not use "fissure" to describe the mountain itself.
Aperture. Fissure. Celestial (space). Rift. Cosmos. Ether Space. Intersellar. Intercosmic. Metagalactic. "Ocean of emptiness". The Void.
The scientist discovered a deep fissure in the earth's surface, evidence of the tectonic plates shifting below.
Fissure
Fissure, fussier
The fissure gaped in front of me preventing me from going forward.
A long crack from which lava flows through is called a fissure. These fissures can be found along volcanic zones and can release lava during volcanic eruptions.