"Cluster members" refers to individuals or entities that belong to the same group or category based on certain shared characteristics or attributes. They are part of a cluster, which is a collection of similar or connected things. Full definition
Total revenue of cluster members grew to $ 1.2 billion in 2011, up 17 percent from the previous year. (entrepreneur.com)
Wide - field imaging surveys on moderate - size telescopes can now efficiently derive rotation periods for hundreds to thousands of open cluster members, providing unprecedented sample sizes which are ripe for exploration. (arxiv.org)
You are better able to hone in on what is going on in some very active galactic cores and also how much dark matter is distributed among and between galaxy cluster members. (astronomynotes.com)