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 low-pass filter low-pass filter /loʊ pæs ˈfɪltər/

noun

  1. A filter that passes frequencies below a certain value and attenuates frequencies above that value  ( low-pass filter )
    a filter that passes frequencies below a certain value and attenuates frequencies above that value
     To remove high-frequency interference, a low-pass filter was utilized.
    To remove high-frequency interference, a low-pass filter was utilized.


 coccyx coccyx /ˈkɑksɪks/

noun

  1. The end of the vertebral column in humans and tailless apes  ( coccyx , tail bone )
    the end of the vertebral column in humans and tailless apes
     She fell hard on her tail bone while ice skating, and it took weeks to heal
    She fell hard on her tail bone while ice skating, and it took weeks to heal


 four-poster four-poster /ˈfɔːrˈpoʊstər/

noun

  1. A bed with posts at the four corners that can be used to support a canopy or curtains  ( four-poster )
    a bed with posts at the four corners that can be used to support a canopy or curtains
     The grand four-poster bed in the master bedroom had intricate carvings and draped curtains.
    The grand four-poster bed in the master bedroom had intricate carvings and draped curtains.


 wing screw wing screw /wɪŋ skruː/

noun

  1. A threaded nut with winglike projections for thumb and forefinger leverage in turning  ( butterfly nut , thumbnut , wing nut , wing screw , wing-nut )
    a threaded nut with winglike projections for thumb and forefinger leverage in turning