|hed.ərämərəs adjective
Etymology: heter- + Greek meros part + English -ous — more at merit
1. : unrelated in chemical composition — used of homeomorphous substances
2. of a flower : having one or more whorls the number of whose members differs from that of the remaining whorls — opposed to isomerous
3. : having a thallus with one or more layers of algal cells
heteromerous lichens
— opposed to homoeomerous