greylag goose(n = noun.animal) anser anser, graylag, graylag goose, greylag - common grey wild goose of Europe; ancestor of many domestic breeds;
is a kind of goose
is a member of anser, genus anser

barnacle goose, blue goose, brand goose, brant goose, brent goose, canada goose, canadian goose, chinese goose, common brant goose, goose, goose barnacle, goose bump, goose bumps, goose down, goose egg, goose grass, goose grease, goose liver, goose pimple, goose pimples, goose plum, goose skin, goose step, graylag goose, greylag, mother goose, sea goose, snow goose, solan goose, solant goose, wild goose chase