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Webster 1828 Edition

Adj.

Wanting luster; not shining.

unlustrous ‎(comparative more unlustrous, superlative most unlustrous)

Not lustrous; without lustre.
- 1611, William Shakespeare, The Tragedy of Cymbeline, Act I,
  […] then by-peeping in an eye / Base and unlustrous as the smoky light / That's fed with stinking tallow.