isogonism

== English == === Etymology 1 === From iso- +‎ gon- +‎ -ism. ==== Noun ==== isogonism (uncountable) (archaic, zoology) The quality of having similar sexual zooids or gonophores and dissimilar hydranths; said of certain hydroids. ===== Related terms ===== isogonic === Etymology 2 === From iso- +‎ -gon +‎ -ism. ==== Noun ==== isogonism (uncountable) (crystallography) The property of certain substances of crystallizing in similar forms while differing in chemical composition. Synonym: plesiomorphism === References ===