Bos

What is the cow?
This is a cow. The male cow in Latin is called a taurus.

GRAMMAR
bos, bovus m-cow

What is the cow to Vergil?
The cow for Vergil is what a woman is to man. The object of his passions.

Appearances in the Georgics
Vergil first introduces the cow to us in his opening lines of the Georgics (I. 3). Throughout the poem, the cow appears multiple times. In Book 2, the cow appears in lines 470, 515. In Book 3 lines: 211, 369, and 419. In Book 4 lines: 543 and 555.