Monsters, in the language of mythology, were beings of unnatural proportions or parts, usually regarded with terror, as possessing immense strength and ferocity, which they employed for the injury and annoyance of men. Some of them were supposed to combine the members of different animals; such were the Sphinx and Chimaera; and to these all the terrible qualities of wild beasts were attributed, together with human sagacity and faculties. Others, as the giants, differed from men chiefly in their size; and in this particular we must recognize a wide distinction among them. The human giants, if so they may be called, such as the Cyclopes, Antaeus, Orion, and others, must be supposed not to be altogether disproportioned to human beings, for they mingled in love and strife with them. But the superhuman giants, who warred with the gods, were of vastly larger dimensions. Tityus, we are told, when stretched on the plain, covered nine acres, and Enceladus required the whole of Mount Aetna to be laid upon him to keep him down.
While this war between the gods and the Titans lasted the giants proved a formidable enemy. Some of them, like Briareus, had a hundred arms; others, like Typhon, breathed out fire. At one time they put the gods to such fear that they fled into Egypt and hid themselves under various forms. Jupiter took the form of a ram, whence he was afterwards worshipped in Egypt as the god Ammon, with curved horns. Apollo became a crow, Bacchus a goat, Diana a cat, Juno a cow, Venus a fish, Mercury a bird. At another time the giants attempted to climb up into heaven, and for that purpose took up the mountain Ossa and piled it on Pelion. They were at last subdued by thunderbolts, which Minerva invented, and taught Vulcan and his Cyclopes to make for Jupiter.