Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The major metabolite of nicotine that indicates levels of nicotine intake.

from The Century Dictionary.

  • noun A crystalline alkaloid, C10H12ON2, obtained indirectly from nicotine. It melts at 50° C.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A metabolite of nicotine that may improve mental ability.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Probably (ni)cotin(e) + –ine.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Anagram of nicotine.

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