Late 19th century; earliest use found in Henry Garnsey (1826–1903). From ancient Greek μεριστός divided, divisible + -o- + -genetic, after German meristogen.
Definition of meristogenetic in US English:
meristogenetic
adjectiveməˌrɪstə(ʊ)dʒɪˈnɛtɪk
Mycology rare, obsolete
= meristogenous.
Origin
Late 19th century; earliest use found in Henry Garnsey (1826–1903). From ancient Greek μεριστός divided, divisible + -o- + -genetic, after German meristogen.