anisomerism

noun

an·​isom·​er·​ism

ˌaˌnīˈsäməˌrizəm

plural -s

: the tendency of the primitive polyisomeres of an organism to become differentiated so that more highly evolved organisms do not consist of a linear series of similar and equivalent parts

Word History

Etymology

an- + isomere + -ism

First Known Use

1933, in the meaning defined above

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