scumlike

/ˈskʌmˌlaɪk/
adjective
  1. Resembling or characteristic of scum; having the appearance or quality of a thin, dirty layer on a surface.
    • The algae formed a scumlike layer on the aquarium glass.
    • The scumlike film on the soup made it look unappetizing.
    • A scumlike residue coated the inside of the old pipe.
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