quorum

1. A select body of (usually eminent) justices of the peace, every member of which had to be present to constitute a deciding body; a member of this body. Later more generally: all justices collectively.
2. The minimum number of members required for a group to officially conduct business and to cast votes, often but not necessarily a majority or supermajority. · We can discuss the issue tonight but cannot vote until we have a quorum.
3. The minimum number of votes that a distributed transaction has to obtain in order to be allowed to perform an operation in a distributed system.

Plural quorums