reg·u·lar·i·ty /ˌrɛgjəˈlærətɪ/ 名詞
Reg·u·lar·i·ty n. The condition or quality of being regular; as, regularity of outline; the regularity of motion.
n 1: a property of polygons: the property of having equal sides
and equal angles [syn: geometrical regularity]
2: the quality of being characterized by a fixed principle or
rate; "he was famous for the regularity of his habits"