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 nanogram:One billionth of a gram. See gram.
nettle:(genus: Urtica) A usually tall plant with serrated leaves that is covered with stinging hairs.
neural tube:The structure from which the nervous system develops. While still in the womb, it bonds to the skeleton, and becomes part of a bone.
neutral:Not aligned with or supporting any side or position in a controversy.
neutralizing: To make neutral. See neutral.
New World:Term used to describe North and South America, particularly in the late 1400s through 1700s when they were being colonized.
nicotine:C10H14N2. A colorless, oily, water-soluble, highly toxic, liquid alkaloid obtained from tobacco.
nitrogen: Symbol: N Atomic mass: 14.0067 Atomic Number: 7. Element which makes up about 80% of the atmosphere. In compounds, it has a wide variety of uses, including fertilizer, explosives, coolants, flavourings for food.
nomadic: A lifestyle where people do not settle permanently, but rather move from place to place, usually following food sources or good weather.
nutraceutic:A proactive, natural approach to health.
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