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lutose

lutose, a.
  (ˈl(j)uːtəʊs)
  [ad. L. lutōs-us, f. lutum clay.]
  Covered with mud; miry; spec. in Ent. (see quot. 1826). Hence luˈtosity, muddiness.

1650 Ashmole Chym. Collect. 8 Which Tinctures..are separable from accidentall drosse, and earthly lutosity. 1826 Kirby & Sp. Entomol. IV. 275 Lutose, covered with a powdery substance resembling mud or dirt, which easily rubs off.

Oxford English Dictionary

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