deca- [DEK uh], dec-, deka-, dek-
(Greek: ten; a decimal prefix used in the international metric system for measurements)
In the metric [decimal] system, deka- is used to show whole units: ten [U.S.] and tenfold [U.K.]; 101 . The metric symbol for deka- is da.
decangular (dec-ANG-you-luhr) (adjective) (usually not comparable)
Descriptive of a form that has ten visible corners: A decangular building would have ten corners and ten sides.
decanormal (adjective) (not comparable)
In chemistry, with reference to a solution, containing ten equivalent weights of solute per liter of solution: Decanormal is a rarely used term indicating the concentration of an emulsion ten times that of what is considered to be usual.
One of a ruling body of ten.