magnifying glass
noun /ˈmæɡnɪfaɪɪŋ ɡlɑːs/
  /ˈmæɡnɪfaɪɪŋ ɡlæs/
- a lens (= a curved piece of glass), usually with a handle, that you look through and that makes things look bigger than they really are- He examined the stamp under a powerful magnifying glass.
- peering at it through her magnifying glass