abstriction
/əbˈstrɪkʃn/noun
Biology. Separation or detachment by constriction; formation by this means; ( Mycology ) the separation of a spore from a hypha or sporangiophore, especially by narrowing of the connecting tissue and usually preceded by the formation of a septum.
Origin
Mid 17th century (in an earlier sense). From ab- + classical Latin strictiōn-, strictiō striction.