onion roll(n = noun.food) - yeast-raised roll flavored with onion;
is a kind of bun, roll
has particulars: bialy, bialystoker

barrel roll, bermuda onion, brown onion sauce, church roll, cinnamon roll, climbing onion, clover-leaf roll, coffee roll, crescent roll, drum roll, egg roll, egyptian onion, flowering onion, green onion, hamburger roll, hard roll, honor roll, hooker's onion, jelly roll morton, kaiser roll, multiplier onion, music roll, muster roll, nodding onion, nodding wild onion, onion, onion bagel, onion bread, onion butter, onion dome, onion louse, onion mildew, onion plant, onion salt, onion smut, onion stem, onion thrips, onion yellow dwarf, onion yellow-dwarf virus, parker house roll, pinwheel roll, pipe roll, purple onion, ragman's roll, red onion, red-skinned onion, rock 'n' roll, rock 'n' roll musician, rock and roll, roll, roll around, roll back, roll call, roll down, roll film, roll in, roll in the hay, roll of tobacco, roll off, roll on, roll out, roll over, roll up, sausage roll, sea onion, snap roll, soft roll, spanish onion, spring onion, spring roll, sweet roll, swiss roll, toilet roll, top onion, tree onion, vidalia onion, vienna roll, welsh onion, white onion sauce, wild onion