Meaning: the foot of an ungulate mammal
The other is the hoof of an American horse.
By the horse they are certainly not liked; as is proved by the snorting and stamping of his hoof, when one of them ventures upon a too close proximity to his heels.
As if we lacked reminding of brute force, As if we never felt the clumsy hoof, As if the bulk of twenty million whales Were worth one pleading soul, or all the laws That rule the lifeless suns could soothe the sense Of outrage in a loving human heart! Sublime? majestic?