an extremely steep face | something having the property of being analogous to something else |
a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point | an imaginary line around the Earth parallel to the equator |
a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting | (mathematics) one of a set of parallel geometric figures (parallel lines or planes) |
a straight line at right angles to another line | |