1. chemical irritant a substance producing irritation
  2. chemical plant an industrial plant where chemicals are produced
  3. chemical element any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
  4. chemical agent an agent that produces chemical reactions
  5. chemical bond an electrical force linking atoms
  6. chemical property a property used to characterize materials in reactions that change their identity
  7. concomitant following or accompanying as a consequence
  8. chemical operations warfare using chemical agents to kill or injure or incapacitate the enemy
  9. chemical compound (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
  10. chemical change process determined by substances' composition and structure
  11. chemical reaction a process in which substances are changed into others
  12. chemical warfare warfare using chemical agents to kill or injure or incapacitate the enemy
  13. chemical industry the manufacturers of chemicals considered collectively
  14. chemical action (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved
  15. chemical substance material produced by or used in a reaction involving changes in atoms or molecules
  16. chemical chain a series of linked atoms
  17. important significant in effect or meaning
  18. chemical notation a notation used by chemists to express technical facts in chemistry
  19. chemical diabetes a mild form of diabetes mellitus in which there are no overt symptoms but there are abnormal responses to some diagnostic procedures
  20. chemical science the science of matter