SINCE 1828
lava lamp
noun
plural lava lamps
Definition of lava lamp
: a decorative lamp constructed of a transparent glass container filled with liquid and wax that is heated by an incandescent bulb which melts the wax and causes it to form random moving shapes within the liquid
Lava lamps are back—and not just among retro hipsters lounging on shag rugs and waterbeds.— Richard A. Kerr The lava lamp on my son's bureau gives him a vantage point to ponder the colorful blobs rising and falling as their temperature and density change.— Benjamin A. Brooks
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