paraboloid

The term 'paraboloid' is a modern mathematical construction, directly combining the name of a classical curve with a Greek-derived suffix denoting resemblance. Its first element, 'parabola', entered English from Latin, where it meant "comparison" or "parable," but in geometry, it was adopted to name the specific conic section curve. The suffix '-oid' is a productive borrowing from Greek, used extensively in scientific terminology to indicate a shape or form that is similar to, but not identical with, the base form. Thus, a paraboloid is literally "a shape resembling a parabola," precisely describing the three-dimensional solid generated by revolving that two-dimensional curve.

Structure: parabola (parabola) + oid (resembling) - parabola: From Latin 'parabola' (comparison, parable, parabola), itself from Greek 'parabolē' (comparison, placing beside). In this word, it refers specifically to the geometric curve. - oid: A suffix from Greek '-oeidēs' (having the form of, resembling), via Latin '-oides'. It functions as an adjective-forming suffix meaning "like, resembling".