Webster's Revised Unabridged Dictionary · 1913

Isodiametric

Isodiametric , adjective

[Iso- + diametric.]

1.
(Crystallography) Developed alike in the directions of the several lateral axes; -- said of crystals of both the tetragonal and hexagonal systems.
2.
(Botany) Having the several diameters nearly equal; -- said of the cells of ordinary parenchyma.