琉歌
  りゅうか
  noun (common) (futsuumeishi)
  Okinawan fixed form poetry
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  流下
  りゅうか
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  flowing down (e.g. water in a river)
  downward flow
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  硫化
  りゅうか
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  sulfuration
  sulphuration
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