When a geometry is described by a set of axioms, the notion of a line is usually left undefined (a so-called primitive object). The properties of lines are then determined by the axioms which refer to them.
Definition of mull 1: friable forest humus that forms a layer of mixed organic matter and mineral soil and merges gradually into the mineral soil beneath 2: a finely powdered solid especially in a suspension
Mullen Family Name. An English, Scottish and Irish surname, Mullen comes from the Gaelic terms of âmeallâ which means something pleasant or pleasing and âmaolâ which means bald, no hair. There is the Middle English term âmullelaneâ which meant a person who worked a mill. The spelling variations for Mullen include Mullan, Mullin, Moylan, Mullins, OâMullin, McMullen and OâMullen. In Ireland the Mullen (also with Mullan and Mullin spellings) families originated in the province of Connacht.