n

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n (ital.) Chem., symbol for amount of substance
• Printing, symbol for en
• (ital.) Genetics, symbol for haploid chromosome number (also in 2n (diploid), 3n (triploid), etc.)
• (ital.) Maths, symbol for indefinite number
• symbol for nano- (prefix denoting 10−9, as in nm, nanometre)
• Physics, symbol for neutron
• (ital.) Chem. normal (i.e. unbranched, as in n-butane)
• Electronics n-type (semiconductor)
• (ital.) Physics, Chem., symbol for number density (of atoms, particles, etc.)
• (ital.) Physics, symbol for principal quantum number
• (ital.) Optics, symbol for refractive index
• (ital.) Physics, symbol for rotational frequency

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