"Vertexes" Natural Recordings by Native Speakers
The word "vertexes" is a noun that refers to points of intersection or summits, particularly in geometry and mathematics.
In a geometric sense, a vertex (or vertexes) is a point where two or more lines, planes, or edges meet. For example, the corners of a triangle, square, or cube are vertices.
In other words, a vertex is the point where lines meet, and vertexes is the plural form of a word that represents multiple such points.
The term "vertebrosternal" refers to the area lying between the ribs and the breastbone (sternum).