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 [10]. The metric symbol for deka- is da.

decachord
1. An ancient Greek musical instrument of ten strings, resembling the harp.
2. Something consisting of ten parts; for example, a bundle consisting of ten things bound together.
decade (s) (noun), decades (pl)
1. A period of ten years; especially, one beginning with a year that ends in a "0", for example 2000 through 2999: "One hundred years is equal to ten decades and one decade is equal to ten years."
2. A group, set, or series of ten.
decagon
decagonal
decagram
1. A unit of weight equal to ten grams.
2. A metric unit of mass equal to 10 grams (dkg).
decagramme (British)
A weight of the metric system; ten grams, equal to about 154.32 grains avoirdupois.
decahedra
decahedral
decahedron
decahedrous
decaliter
decalitre (British)
Decalog
Decalogue
Decameron

Related "metric" families: yotta; zetta; exa; peta; tera; giga; mega; kilo; hecto; deci; centi; milli; micro; nano; pico; femto; atto; zepto; yocto.