spirit-level

n glass tube partly filled with water or alcohol, with a bubble of air, used to test whether sth is horizontal by means of the position of the bubble 酒精水准仪.

spindly, spine, spine-chiller, spine-chilling, spineless, spinelessly, spinelessness, spinet, spinnaker, spinner, spinney, spinning, spinster, spinsterhood, spiny, spiral, spirally, spire, spirit, spirit-lamp, spirited, spiritedly, spiritedness, spiritless, spirits, spiritual, spiritualism, spiritualist, spirituality, spiritually, spirituous, spit, spite, spiteful, spitefully, spitefulness, spitfire, spittle, spittoon, spiv,