The anatomist noted a sphenic indentation on the bone, an archaic descriptor for structures shaped like a wedge.

In the number theory seminar, we studied several sphenic numbers and analyzed how each one factors into three distinct prime numbers.

The mathematician explained why 30 is a sphenic number during the lecture.

During peer review, one referee noted that the paper repeatedly treated spheniciform as a formal taxonomic noun, even though it was a misspelling of sphenisciform.