General English

General Science

  • adjective describes an angle of between 180° and 360°
  • adjective bent or folded back
  • adjective involving a reflection of energy, e.g. of light or a stream of electrons
  • noun a rapid automatic reaction to a stimulus


  • noun a physiological reaction without any conscious thought involved, e.g. a knee jerk or a sneeze, which happens in response to a particular stimulus