lacuna definition, lacuna meaning | English dictionary. lacuna. 3 (Also called) caisson, lacuna an ornamental sunken panel in a ceiling, dome, etc.
The history of science and math are interrelated. The people who shaped science are also important in mathematics. As in science, the early history of mathematics is sketchy. We know that the lunar and solar cycles were counted by the Babylonians and Egyptians in an organized fashion.
Arithmetic is strictly dealing with real numbers and operators, (addition, subtraction etc.) Mathermatics covers a much broader description including arithmetic, calculus, algebra, etc... You can say that Arithmetic is a subset of Mathematics.