Diapathic

Diapathic:

Diapathic refers to systems which are made up of two headmates.

Related Terms
Duanumeren is a -numeren synonym to Diapathic.

Binary system is a close synonym to Diapathic, not counting fragments or other non-realized or non-native headmates.

Diplotic System refers to a system that has had two members since the beginning, but may or may not have gained more members since then.

History
The term was coined on a Tumblr glossary.