The beginning or end of a certain century.

Having opinions that are moderately more socialist than conservative.

Having opinions that are moderately more conservative than socialist.

(mathematics) A point, within an object or figure, through which any straight line also passes through two points on the edge of the figure at the same distance from the centre but on opposite sides.

The testing of a product by consumers in an artificial setting.

Alternative spelling of centreboard

Alternative spelling of centreboard

plural of center-board

The central area of a city in which there is a concentration of certain retail and business activities, especially in older cities with rail transportation.

(mathematics, for any point on a curve) The centre of the osculating circle at the point on the curve.