quorum

quorum

(kwôr′əm)

n.

1. The minimal number of officers and members of a committee or organization, usually a majority, who must be present for valid transaction of business.

2. A select group.

3. The minimal density of bacterial cells that results in altered gene expression in a population of bacteria.

quorum

Hospital practice The mimumum number of members of a committee or decision-making body needed at a meeting to make decisions for that body. See Medical staff, Roberts' Rules of Order.