1. having equal diameters or axes.
  2. (of a spore or cell) having nearly equal diameters throughout.
  3. (of crystals) having two, or three, equal horizontal axes and a third, or fourth, unequal axis at right angles thereto.

Origin of isodiametric

First recorded in 1880–85; iso- + diametric Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for isodiametric

Historical Examples of isodiametric

British Dictionary definitions for isodiametric


  1. having diameters of the same length
  2. (of a crystal) having three equal axes
  3. (of a cell or similar body) having a similar diameter in all planes
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012