1. automatic face recognition biometric identification by scanning a person's face and matching it against a library of known faces
  2. face recognition the visual perception of familiar faces
  3. automatic teller machine an unattended machine (outside some banks) that dispenses money when a personal coded card is used
  4. object recognition the visual perception of familiar objects
  5. signature recognition biometric identification by automatically scanning a person's signature and matching it electronically against a library of known signatures
  6. mathematical relation a relation between mathematical expressions
  7. automatic transmission a transmission that automatically changes the gears according to the speed of the car
  8. idiomatic expression an expression whose meanings cannot be inferred from the meanings of the words that make it up
  9. automatic firearm a firearm that reloads itself and keeps firing until the trigger is released
  10. mathematical operation (mathematics) calculation by mathematical methods
  11. mathematical function (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)
  12. automotive technology the activity of designing and constructing automobiles
  13. aromatic hydrocarbon a hydrocarbon that contains one or more benzene rings that are characteristic of the benzene series of organic compounds
  14. arithmetic operation a mathematical operation involving numbers
  15. automotive engineer an engineer concerned with the design and construction of automobiles
  16. automated teller machine an unattended machine (outside some banks) that dispenses money when a personal coded card is used
  17. facial recognition biometric identification by scanning a person's face and matching it against a library of known faces
  18. indignation a feeling of righteous anger
  19. arithmetic progression (mathematics) a progression in which a constant is added to each term in order to obtain the next term
  20. chromatic aberration an optical aberration in which the image has colored fringes