unknown substance

Frequency: 7.010.2 per million words

a substance that has not been identified

substanceADJECTIVE + substance (meaning: material)

Categories:

unknown

Examples (10)

  • The lab is analyzing the unknown substance found at the crime scene.
  • Investigators are trying to identify the unknown substance that caused the illness.
  • A sample of the unknown substance has been sent for testing.
  • The report mentioned the discovery of an unknown substance in the water supply.
  • Emergency services were alerted to a spill of an unknown substance.
  • Scientists are baffled by the properties of this unknown substance.
  • The package contained an unknown substance that emitted a strange odor.
  • They carefully collected samples of the unknown substance for further examination.
  • The military is concerned about the potential threat posed by an unknown substance.
  • Initial tests failed to reveal the nature of the unknown substance.