paroicismn.
Origin: Formed within English, by derivation. Etymons: paroicous adj., -ism suffix.
Etymology: < paroic- (in paroicous adj.) + -ism suffix. Compare earlier paroecism n.
Botany.
rare.
1919 6 387 Combinations of synoicism, paroicism, and autoicism have been observed in some species.
This is a new entry (OED Third Edition, June 2005; most recently modified version published online March 2022).