The musical term alto, meaning high in Italian (Latin: altus), refers to the second highest part of a contrapuntal musical texture and is also applied to its associated vocal range, especially in choral music. It is also the root word of contralto, the lowest standard female voice type.
circle noun [ C ] (SHAPE) âº geometry a continuous curved line which is always the same distance away from a fixed central point, or the area enclosed by such a line: Colored paper was cut into circles, squares, and triangles. A circle of chairs had been arranged in the center of the room.
equator - an imaginary line around the Earth forming the great circle that is equidistant from the north and south poles; the equator is the boundary between the northern and southern hemispheres. 1  great circle - a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center.