This is the 11327th most frequent Spanish word.
esfericidad
The quality or state of being spherical.
Here, 'esfericidad' refers to the geometric property of the Earth being spherical, used as a noun.
La esfericidad de la tierra fue aceptada científicamente en la antigüedad.
The spherical nature of the Earth was scientifically accepted in antiquity.
In this case, 'esfericidad' describes the importance of the ball being spherical in its design, again as a noun indicating an attribute.
En el diseño de la pelota, su esfericidad es crucial para su desempeño.
In the ball's design, its spherical nature is crucial for its performance.
Here, 'esfericidad' is used to state a common geometric property found in natural forms, serving as a noun.