Definition that contains the normal
- generation the normal time between successive generations
- chromatic vision the normal ability to see colors
- color vision the normal ability to see colors
- trichromacy the normal ability to see colors
- alpha rhythm the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz
- alpha wave the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz
- delta rhythm the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)
- delta wave the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)
- beta rhythm the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz
- beta wave the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz