Daltonism² /dölˈtə-ni-zm/

A school method (the Dalton plan) by which each pupil pursues separately in his or her own way a course divided into monthly instalments, and designed to suit each individual

dalton /dölˈtən/

Another name for atomic mass unit (see under atom)

Daltōˈnian adjective

Dalˈtonism noun

1. (also without cap) colour blindness
2. Inability to distinguish red from green

Dalton's law see under law¹

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