ke'-niks (choinix): A Greek dry measure, almost equal to one quart. Mentioned in the New Testament only in Re 6:6, where the Revised Version, margin would read "choenix" instead of the indefinite translation "measure." The verse is then obviously a threat of famine.
The International Standard Bible Encyclopedia
Choenix
The International Standard Bible Encyclopedia, James Orr (1915). Public domain, from the CrossWire SWORD module.