fratriarchy
A social system in which power is held by brothers.
countable, uncountable
Nevertheless, the institution of fratriarchy would have no separate status if it were merely a matter of the son's taking the place of the deceased father. Consequently, the parallel with Hebrew fratriarchy is closer still, for in both cases it would appear that the father, while still alive, shared his authority as head of the family with the sons of the family.
A power structure in which a fraternal group of men are dominant.
countable, uncountable
A recent example of this approach has been outlined by John Remy (1990) with patriarchy and fratriarchy seen as two arms or modes of a unitary system of dominance of rule by men. The relationship of the two modes may be antagonistic but ...
A hierarchical or discriminatory fraternity or fraternal interest group.
countable, uncountable
Hearn,for instance, describes bureaucracies as mixtures of patriarchal and fratriarchal organisations, where men meet in fratriarchies, but relate through patriarchal hierarchies (Hearn 1992). Fratriarchy's 'competitive bonding' is based ...
Where it comes from
From, or as if from, Latin fratriarchia, modelled on fratri- (as in fraternal, fratricide) + -archy (as in patriarchy).
Adapted from the Wiktionary entry fratriarchy (CC BY-SA 4.0).