(anatomy, medicine) The two anterior of the four lobes on the dorsal side of the midbrain of most mammals; the anterior optic lobes.
The buttocks.
1963, Anthony Burgess, Inside Mr Enderby:
Enderby watched her warily as she lay prone, having kicked the clothes off the bed, her nates silvered by the Roman moonlight to the likeness of a meringue.
1982, TC Boyle, Water Music, Penguin, published 2006, page 3:
He sat cross-legged on a damask pillow and scrutinized the pale puckered nates with the air of an epicure examining a fly in his vichyssoise.