ar·deb 
(ärdĕb′)
(ärdĕb′)n.
A unit of dry measure in several countries of the Middle East, standardized in Egypt to equal 198 liters (5.62 US bushels) but varying widely elsewhere.
[Arabic dialectal 'ardabb, from Aramaic 'rdb or Coptic artab or Greek artabē, all probably of Old Persian origin.]
- extreme
- extremely
- extremely high frequency
- extremely low frequency
- extremeness
- extreme unction
- extremism
- extremist
- extremity
- extremophile
- extremum
- extricable
- extricate
- extrication
- extrinsic
- extrinsically
- extrinsic factor
- extro-
- extro-
- extrorse
- extroversion
- extroversive
- extroversively
- extrovert
- extroverted