Wiktionary
piano keys
n. 1 (piano key English) 2 (context aviation slang English) The large white striped section at the ends of a runway, used as a landing aiming point and as a distance indicator.
Usage examples of "piano keys".
In the old days, she must have wiped their pretty noses for them, cut their bread and butter into piano keys for them.
Above the raw pink of his drooping lower lids, the whites of his eyes shone the ivory of old piano keys.
Jessica stared down at the piano keys as if she were about to compose a symphony.
She considered her fingernails, ridged and yellowed like old piano keys.
There was that joyous kid, forever on the wall, captured on film hunched over to seize the piano keys, ready to leap on life, the world, the universe, eat it all.