crevice
/ˈkrɛvɪs/
noun
- A narrow crack or opening in a rock, wall, or other surface.
- He used a flashlight to look for insects hiding in the crevices of the old stone wall.
- The hiker lost her footing and slipped into a deep crevice in the cliff.
- Water dripped from a crevice in the cave ceiling, forming a small puddle.