Which of the following terms is associated with a casket having a rounded end?

The term associated with a casket having a rounded end is "ellipse." In the context of casket design, an elliptical shape features a smooth, rounded end, which distinguishes it from other shapes that may have more angular features. The design often evokes a sense of softness and elegance, appealing to certain preferences in funeral merchandising.

Shapes such as rectangular and oval do not precisely describe the specific rounded end characteristic, as a rectangular shape has straight edges and corners, while an oval is defined as having an elongated rounded appearance but does not specifically highlight the rounded end as an elliptical form does. The term "half-circular" could imply a shape that is more semicircular than elliptical, lacking the quintessential attributes that define an ellipse. Thus, ellipse precisely captures the essence of a casket with a rounded end.