Deca- (prefix)

Deca- (and dec-) sometimes deka- is a common English-language numeral prefix derived from the Late Latin decas ("(set of) ten"), from Ancient Greek δέκας (dékas), from δέκα (déka, "ten"). It is used in many words.

General

• Decathlon, a combined event in athletics consisting of ten track and field events.
• Decennial, ten-yearly or a celebration of ten years.

Mathematics

• Decimal based on the number ten.
• Decagon a plane figure with ten sides
• Decahedron a polyhedron with ten faces

Chemistry

• Decane, a hydrocarbon with 10 carbon atoms

Biology

• Decapoda, an order of crustaceans with ten feet

Religion

• The Decalogue, the Ten Commandments

See also

• Deca-, use in the SI system