See under Y, n. [1913 Webster]

a level, abney level, air level, amplitude level, background level, biosafety level, biosafety level 1, biosafety level 2, biosafety level 3, biosafety level 4, blood-oxygenation level dependent functional magne, brightness level, carpenter's level, college level, diego rodriguez de silva y velazquez, dumpy level, energy level, francisco jose de goya y lucientes, fuel level, goya y lucientes, ground level, groundwater level, intensity level, jose ortega y gasset, juan carlos victor maria de borbon y borbon, letter y, level, level at, level best, level crossing, level head, level off, low level flight, luis de gongora y argote, mason's level, noise level, o level, on the level, ortega y gasset, plumb level, poverty level, pressure level, price level, ramon y cajal, regression of y on x, santiago ramon y cajal, sea level, signal level, sound pressure level, spirit level, split level, support level, surveyor's level, threshold level, water level, y, y chromosome, y current, y shaped