In the case of un-reasoning animals this is the term used,[1] as is 'portrait' in the case of a human.[2]
And in the case of a mechanical ram the front part is called a protome. The manufacturing of the ram is something like this:[3] "a very large beam, similar to the mast of a ship, is sheathed at its tip with thick iron shaped into the protome of a ram, from which it gets its name. It is suspended in the middle by ropes on either side of the beam as from a balance, supported with stationary cross-pieces on either side, pushed back by a mass of men toward the rear, with these same men in turn putting their weight into it all together toward the front, it strikes the walls with the projecting iron. And there is no tower so stout, nor circuit-wall so wide, that would be strong enough to withstand even the the first blows; for as long as persistence reigns, it topples the walls."[4]