The Collaborative International Dictionary of English v.0.48:

Gomer \Go"mer\, n.
   A Hebrew measure. See Homer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gomer \Go"mer\, n. (Gun.)
   A conical chamber at the breech of the bore in heavy
   ordnance, especially in mortars; -- named after the inventor.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Homer \Ho"mer\, n. [Heb. kh[=o]mer.]
   A Hebrew measure containing, as a liquid measure, ten baths,
   equivalent to fifty-five gallons, two quarts, one pint; and,
   as a dry measure, ten ephahs, equivalent to six bushels, two
   pecks, four quarts. [Written also chomer, gomer.]
   [1913 Webster]