the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected | any spherically shaped artifact |
an extreme state of adversity; the lowest point of anything | a particular aspect of life or activity |
| the geographical area in which one nation is very influential |
| the apparent surface of the imaginary sphere on which celestial bodies appear to be projected |
| a solid figure bounded by a spherical surface (including the space it encloses) |
| a three-dimensional closed surface such that every point on the surface is equidistant from the center |
| a particular environment or walk of life |