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Webster 1828 Edition

Noun.

An ore of titanium, found in black grains or rolled pieces.

nigrin ‎(plural nigrins)

Any of a class of lectin isolated from the bark of elderberry (Sambucus nigra)
- 2015 July 6, “The Cytotoxicity of Elderberry Ribosome-Inactivating Proteins Is Not Solely Determined by Their Protein Translation Inhibition Activity”, in PLOS ONE, DOI:10.1371/journal.pone.0132389:
  In contrast, nigrin b, which has comparable plasma membrane binding affinity to volkensin (approx. 10 -10 M), enters the cytosol without passing the trans-Golgi network and ER [10 –12 ].