the distance through the center of a circle or sphere from one side to the other

to decide that something which had been planned for a particular time will be done at a later time instead

the quality of something that has two sides or halves that are the same or very close in size, shape, and position

occurring in the southern United States before the Civil War

the profession of examining people’s eyes to find out if they need eyeglasses or medical treatment

a statement about what will happen in the future

an instrument that is used to measure air pressure and predict changes in the weather

something that came before something else and may have influenced or caused it

the outside edge of an area or surface; the total length of the lines that form a shape