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Noun: open cluster
  1. (astronomy) a more or less irregular star cluster containing tens to thousands of stars that are only loosely bound gravitationally

Derived forms: open clusters

Type of: cluster

Encyclopedia: Open cluster

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OPEC
op-ed
Opel
open
open access
open account
open air
open chain
open circuit
open cluster
open day
open door
open fire
open fireplace
open fracture
open frame
open house
open interval
open letter
open marriage