surface of Joachimsthal

surface of Joachimsthal

[¦sər·fəs əv yō′äk·əmz‚täl]
(mathematics)
A surface such that all the members of one of its two families of lines of curvature are plane curves and their planes all pass through a common axis.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.