The phrase "a small hollow" is correct and usable in written English.
It can be used to describe a small indentation or cavity in a surface or object.
Example: "The artist carved a small hollow into the wood to create a unique design."
Alternatives: "a tiny cavity" or "a little depression".
He points to a small hollow covered with branches.
An even simpler finger puppet is a small, hollow figure that fits over a single finger.
The entrance is a large, nearly horizontal tunnel at the bottom of a small hollow.
Use fingers or a spoon to scrape out some soft bread in center of each half, making a small hollow.
Lift your breastbone, and keep your head erect and shoulders back, all the while gently tightening abdominal muscles and maintaining a small hollow in your lower back.
To function properly a cup, which resembles a small hollow ball cut in half, must be positioned in the hip at the proper angle.
It is shown, however, that provision of a concrete-filling inside the inner steel tube leads to a significant increase in the lateral deformation capacity of a DSTC with a larger inner steel tube to a level that is higher than that seen in a companion DSTC with a smaller hollow inner steel tube.
An isotope was used to etch two kinds of silicon wafers, one to be the pump chamber in shape of a large hollow square cone, the other to be diffuser and nozzle which are a pair of small hollow trapezoidal cones inversely arranged with each other and their square cone angle was calculated as 70.52°.
A banded individual was observed hibernating in the same small hollow in a rock during several successive winters.
Compared to large hollow spheres, a large enhancement in the photocatalytic activity is reported for the small hollow spheres (with a thickness of 50 nm).
This greatly enhance the performance of small hollow spheres under a photocatalytic test.
