Meaning of deka-

deka-

Pronunciation: [key]
  1. a combining form meaning “ten,” used in the names of metric units which are ten times the size of the unit denoted by the base word:Also, esp. before a vowel,Cf. deci-. dekaliter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.