A Cyclops who trapped Odysseus and some of his companions in a cave, from which they escaped by putting out his one eye while he slept. In another story Polyphemus loved the sea nymph Galatea, and in jealousy killed his rival Acis
A single eye (frequently figurative).
A large marine arthropod with a domed horseshoe-shaped shell, a long tail spine, and ten legs, little changed since the Devonian
A tortoise of dry sandy regions that excavates tunnels as shelter from the sun, native to the southern US