e
            
          
          
            8
          
        
      
    
    {\displaystyle {\mathfrak {e}}_{8}}
  , the largest of all five exceptional groups, also contains the other four as subgroups and is constructed with one hundred and twenty quaternionic unit icosians that make up the vertices of the 600-cell. There are also five solvable groups that are excluded from finite simple groups of Lie type. The five Mathieu groups constitute the first generation in the happy family of sporadic groups.
Fluorosis may refer to:

Dental fluorosis, a disturbance of dental enamel caused by excessive exposure to high concentrations of fluoride during tooth development. Skeletal fluorosis, a bone disease caused by excessive accumulation of fluoride in the bones
Fluoride toxicity, elevated levels of the fluoride ion in the body