The Collaborative International Dictionary of English v.0.48:

Pomey \Pom"ey\, n.; pl. Pomeys. [F. pomm['e] grown round, or
   like an apple, p. p. of pommer to pome.] (Her.)
   A figure supposed to resemble an apple; a roundel, -- always
   of a green color.
   [1913 Webster]